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When Serena Williams spotted a couple getting married on a Miami beach, the tennis star made quite the racket: She crashed the nuptials and posed for photos with the bride, groom and guests, all while sporting a leopard print swimsuit.

When Serena Williams spotted a couple getting married on a Miami beach on May 31, the tennis star made quite the racket: She crashed the nuptials and posed for photos with the bride, groom and guests, all while sporting a leopard print swimsuit.

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THE IRON LADY, Meryl Streep as Margaret Thatcher, 2011. ph: Alex Bailey/©Weinstein Company/courtesy Everett Collection

In December 2011, one lucky couple tying the knot at Manchester Town Hall in Manchester, UK, got an award-winning wedding crasher: Meryl Streep, in costume as Margaret Thatcher. Streep was on hand filming "The Iron Lady," but she tried not to steal too much of the spotlight from the lady in white.

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When John Travolta ran into this couple in Georgia the day before their wedding, they extended a last minute invitation to the actor. But they never expected him to actually show up!

When John Travolta ran into this couple in Georgia the day before their wedding, they extended a last-minute invitation to the actor. But they never expected him to actually show up!

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Usain Bolt was going for a walk in Paris when a bride and groom actually ran away from the ceremony to snap a photo with the lightning-fast Olympian.

Usain Bolt was going for a walk in Paris when a bride and groom actually ran away from the ceremony to snap a photo with the lightning-fast Olympian.

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76646, LOS ANGELES, CALIFORNIA - Saturday April 21, 2012. SELENA VISITS JUSTIN ON SET! Justin Bieber and Selena Gomez embrace and kiss as she visits him on the set of his new music video 'Boyfriend'. The couple looked ecstatic to be seeing each other, with Justin showing Selena around set before listening to music in a Range Rover where she sat on his lap and danced. Photograph: Bruja/Rachid Ait, ©PacificCoastNews.com **FEE MUST BE AGREED PRIOR TO USAGE** **E-TABLET/IPAD & MOBILE PHONE APP PUBLISHING REQUIRES ADDITIONAL FEES** LOS ANGELES OFFICE:+1 310 822 0419 LONDON OFFICE:+44 20 8090 4079

Justin Bieber and Selena Gomez were going for a long walk on the beach in Malibu in July 2011 when Biebs heard his hit "One Less Lonely Girl" playing. The onetime teen power couple marched on over, mingled with guests for about 10 minutes, then went about their business.

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Lebron James was doing an interview at the Ritz-Carlton Coconut Grove in Miami in June 2012 when Shaun and Jamie Kolnuck were getting married at the hotel. James posed for a photo with the couple only moments before they walked down the aisle.

Lebron James was doing an interview at the Ritz-Carlton Coconut Grove in Miami in June 2012 when Shaun and Jamie Kolnuck were getting married at the hotel. James posed for a photo with the couple only moments before they walked down the aisle.

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LONDON, ENGLAND - MAY 28: Queen Elizabeth II talks to members of the Household Cavalry during a special Garden Party for the Regiment at Buckingham Palace on May 28, 2014 in London, Untied Kingdom. (Photo by John Stillwell - WPA Pool Getty Images)

Is it really crashing if you're invited? John and Frances Canning sent Queen Elizabeth II an invitation to their nuptials in Manchester, England, but didn't expect her to actually show up. The Queen popped in to congratulate the happy (and shocked) couple, then went on with her duties for the day.

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These days, Brad Pitt is busy dealing with red carpet crashers. But in September 2013 while the male half of Brangelina was filming "Fury" in Buckinghamshire, England, he stopped by a hotel bar for some drinks. Pitt ran into newlyweds Abi and Daniel Lingwood and hung around to pose for photos with the happy couple.

These days, Brad Pitt is busy dealing with red carpet crashers. But in September 2013, while the male half of Brangelina was filming "Fury" in Buckinghamshire, England, he stopped by a hotel bar for some drinks. Pitt ran into newlyweds Abi and Daniel Lingwood and hung around to pose for photos with the happy couple.

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When Steven Tyler strolled past Jeffrey D. Roseman and Shirley Ramos' wedding at the Four Seasons in Washington DC, the photographer invited the Aerosmith crooner to pose for photos with the happy couple. Not wanting to miss a thing, Tyler hung around for about 15 minutes before his bodyguard escorted him out.

When Steven Tyler strolled past Jeffrey D. Roseman and Shirley Ramos' wedding at the Four Seasons in Washington, DC, in July 2013, the photographer invited the Aerosmith crooner to pose for photos with the happy couple. Not wanting to miss a thing, Tyler hung around for about 15 minutes before his bodyguard escorted him out.

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In spring 2013, Conan O'Brien crashed Wes and Victoria Hoffman's wedding after a guest repeatedly tweeted him inviting him to come. O'Brien posed for pics with the bride, groom and guests, and they were more than happy to have him: the Hoffmans met at a comedy show in 2010 where O'Brien performed.

In spring 2013, Conan O'Brien crashed Wes and Victoria Hoffman's wedding after a guest repeatedly tweeted him, inviting him to come. O'Brien posed for pics with the bride, groom and guests, and they were more than happy to have him: The Hoffmans met at a comedy show in 2010 where O'Brien performed.

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DMX is seen arriving at the "Summer Anthems Tour" at the Deck in Essington, PA. Pictured: DMX Ref: SPL588867 020813 Picture by: Ouzounova/Splash News Splash News and Pictures Los Angeles: 310-821-2666 New York: 212-619-2666 London: 870-934-2666 photodesk@splashnews.com

DMX is making the most of his time out of the slammer, helping a bridal party "Party Up" on a rented bus. Just in case the fellow riders got too rough, though, the rapper brought his bouncer along for the trip.

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Taylor Swift and her then-teenage boyfriend, Conor Kennedy, reportedly crashed Liam Kerr and Kyle Kennedy's wedding in August 2011. Though Swift's rep denied the claims, other guests, including Kathie Lee, said that Swift wasn't invited and that she and her hot high schooler never even RSVPed to the event, which they then refused to leave. Perhaps to karmically make up for the faux pas, in 2014, Swift "crashed" a fan's bridal shower -- but was more than welcome there, taking selfies with guests, delivering a barrage of gifts and generally being adorable.

Taylor Swift and her then-teenage boyfriend, Conor Kennedy, reportedly crashed Liam Kerr and Kyle Kennedy's wedding in August 2011. Though Swift's rep denied the claims, other guests, including Kathie Lee, said that Swift wasn't invited and that she and her hot high schooler never even RSVPed to the event, which they then refused to leave. Perhaps to karmically make up for the faux pas, in 2014, Swift "crashed" a fan's bridal shower -- but was more than welcome there, taking selfies with guests, delivering a barrage of gifts and generally being adorable.

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LONDON, UNITED KINGDOM - MAY 28: Bill Clinton leaving Claridges Hotel on May 28, 2014 in London, England. (Photo by Mark Robert Milan/GC Images)

Bill Clinton was staying at the Castlemartyr Resort in Cork, Ireland, in June 2012. When he saw Pat Howard and Kelly Seamans holding their wedding reception at the venue, the former Prez introduced himself, offered his congratulations and posed for photos. No word on whether he offered marriage advice, though.

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Katy Perry and Robert Pattinson surprised a happy couple at their wedding rehearsal in spring 2013. Perry and Pattinson sat quietly in the back of a Santa Barbara, California, venue, dressed down and quietly taking in the proceedings of complete strangers.

Katy Perry and Robert Pattinson surprised a happy couple at their wedding rehearsal in May 2013. Perry and Pattinson sat quietly in the back of a Montecito, Calif., venue, dressed down and quietly taking in the proceedings of complete strangers. They didn't interact with any of the guests, but were still described as "the talk of the wedding."

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Keeping the crowds quiet and informed outside "The Late Show with David Letterman" on April 2, 2014

Keeping the crowds quiet and informed outside "The Late Show with David Letterman" on April 2, 2014

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Taylor Swift surprised 2 lucky fans when she showed up to their wedding. She took photos with guests and performed "Blank Space" for their first dance.