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Sofia Vergara, Joe Manganiello

GVK/Bauer-Griffin/GC Images

This just can't be "Summer Love!"

Sofia Vergara and Joe Manganiello didn't hide their affections when they attended Justin Timberlake's concert at L.A.'s Staples Center Tuesday. The hot new couple arrived to the PUMA party at Hyde Lounge after 8 p.m. and talked to Vergara's Emmy-nominated Modern Family co-star, Jesse Tyler Ferguson, and his husband, Justin Mikita. An eyewitness reveals the genetically blessed duo grabbed food before getting cozy in their private booth.

The Modern Family actress and the True Blood stud also "danced in their booth with Jesse and Justin," the eyewitness tells E! News. Ever a gentleman, "Joe got her wine at the bar and was very attentive."

Sofia Vergara, Joe Manganiello

John Shearer/Invision for PUMA/AP Images

Other celebrity couples included Lea Michele and Matthew Paetz; newlyweds Ryan Dorsey and Naya Rivera; Josh Beech and Shenae Grimes. Pitch Perfect 2 star Hailee Steinfeld also attended the concert.

At one point, Elizabeth Banks—who has guest-starred on Modern Family several times—approached the group to say hello and kissed everyone on the cheek. "Joe and Sofía looked so into each other. Sofía would whisper in his ear and giggle. She wrapped her arm around Joe and he nuzzled her neck. They were kissing and cuddling like they couldn't keep their hands off each other," the eyewitness says. "She held onto him so sweetly. During the concert, they watched the show but were very into each other."

Sofia Vergara, Joe Manganiello

NGRE/AKM-GSI

This wasn't the first time Vergara and Manganiello have double-dated with Ferguson and Mikita. Earlier this month, the foursome headed to the Hollywood Bowl to support Sarah Hyland at the Hair opening.

What does Ferguson think of Vergara's new man?

"I will say that they're extremely comfortable around one another and that's a sign of them just having a really nice time," he recently told E! News. "I think he's a really good guy."