“Shameless” star Emmy Rossum has split with her co-star Tyler Jacob Moore after dating for two years, sources tell Page Six. The couple, who play Fiona Gallagher and Tony Markovich, recently broke up, and Rossum was spotted in the Hamptons over the weekend and overheard telling friends that she was “single again.” A happy-looking Rossum, along with her friend Berri Goldfarb, were guests at a July Fourth bash in Sagaponack thrown by Vbeauté founder Julie Macklowe and her real estate investor husband, Billy. Rossum was seen blowing up balloons and playing with the kids at the bash. Guests included p.r. maven Alison Brod, Marisa Noel Brown, Gigi Grimstad, Niche Media’s Samantha Yanks, Oak Hill Advisors’ Glenn August and wife Debbie, Eleanor Propp and Liz Winter. Sun Capital king Marc Leder — known for his own wild Hamptons parties — also made a brief appearance with a group and an eye-catching woman on his arm. Rossum’s rep didn’t get back to us.