Burlesque-dancing royal cousin Katrina Darling has quit her London banking job to focus on her showbiz career full-time.

Darling, 21, who is a distant cousin of Kate Middleton, worked as an analyst of portfolios at Barclays in the premiere banking division for more than a year. We’re told she gave the required two weeks notice.

Darling’s burlesque dancing career has flourished since she started working at Barclays last summer, around the time it was discovered that she was a distant relative of the new British royal.

She booked her first performance in the US in March at SoHo nightclub W.i.P. Since then, a reality show about her life on the road is in development, as are other projects including a clothing line.

In March, Darling told us her Barclays co-workers were “very supportive” of her work as a burlesque dancer, where the curvy cutie ends up in a pair of pasties barely covering her regal bits in her trademark Sex Pistols/royal-inspired act, “God Save the Queen.”

“They know that I do this on the side. Everybody is really supportive. My team at work is great,” she told us then. “The English know how to laugh at themselves a bit more.”

Darling is now planning her next big show on Wednesday at London club Whisky Mist for flamboyant promoter Daniel Lismore’s regular Wednesday night party, where she’ll titillate the crowd with her “God Save the Queen” number.

The jiggling royal cousin’s performance in London comes just as festivities for the Queen’s Jubilee, marking Queen Elizabeth’s 60 years of reign over Britain, kick off around the United Kingdom.

Darling is a second cousin once removed to the Duchess of Cambridge, who married Prince William in April 2011. She only learned of her royal relation through the British press right before the big wedding.