New parents Jesse Williams and wife Aryn Drake-Lee enjoyed a night out at the Weinstein Company's Golden Globes after-party Credit: Paul Redmond/WireImage

No ordinary date night for these new parents! Jesse Williams and wife Aryn Drake-Lee -- who welcomed a baby daughter last month -- went all out for their night out on Sunday, Jan. 12.

The couple joined A-listers like Bradley Cooper, Naomi Watts, and Leonardo DiCaprio at the Weinstein Company's 2014 Golden Globes after-party at the Beverly Hilton Hotel's Old Trader Vic's, where they packed on the PDA and enjoyed Moet & Chandon champagne and cocktails.

An onlooker tells Us Weekly the Grey's Anatomy actor, 32, and the real-estate broker, 33, walked hand-in-hand through the bash before finding a spot on the balcony by the bar. They stood there kissing and hugging "for ages," the eyewitness says.

As Us Weekly exclusively confirmed earlier this month, Williams and Drake-Lee welcomed their first child in early December. They named their little bundle of joy Sadie.

The new father is best known for playing Dr. Jackson Avery on ABC's long-running medical drama Grey's Anatomy. He also had a part in the critically acclaimed (but Golden Globes-snubbed) movie Lee Daniels' The Butler.