Going Strong! Leighton Meester Supports Adam Brody at ‘Lovelace’ Premiere

Considering yesterday was the 10th anniversary of "The O.C." hitting the small screen, it's fitting that Adam Brody spent the evening with his real life Summer Roberts.

Meester, 27, made a low-key entrance away from the red carpet to support her boyfriend at the L.A. premiere of "Lovelace" on Monday night.

The former "Gossip Girl" star — who looked stunning in a green jumpsuit — waited for Adam just outside the Egyptian Theater as he finished press interviews on the red carpet. After Adam wrapped, the 33-year-old actor found his ladylove and wrapped his arms around her as they walked inside and talked with a few other people.

Adam and Leighton weren't the only sly couple to hit up the premiere together…

It was date night for "Pitch Perfect" co-stars Anna Camp and Skylar Astin as well.

Although the adorable duo arrived together, they posed separately on the red carpet before finding their seats together inside. Anyone else still totally aca-in love with this off-screen romance?

After cast and crew introductions, Adam joined Leighton in the back of the theater to screen the film. When the movie was over the duo headed over to the after-party together at No Vacancy at Hotel Juniper in Hollywood.

Adam and Leighton — who co-starred in the 2011 film "The Oranges" and were outed as a couple in February — appeared to be "totally smitten together" last night an eyewitness tells omg!.

Meanwhile, Amanda Seyfried, who was rumored have gotten "cozy" with Justin Long at the "Lovelace" premiere in NYC, celebrated with the cast and crew, including co-star Chris Noth.

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