The pair -- who first sparked romance rumors last month -- left the famed West Hollywood music and comedy venue Largo at the Coronet holding hands. Beckinsale, 45, looked chic in a black-and-white coat by AllSaints and knee-high heeled boots, while Davidson, 25, sported a casual blue T-shirt and sweatpants.
ET has learned Davidson and Beckinsale are officially dating.
“I don’t like that she talked all that s**t for my penis,” he says in the joke.
“Everything is huge to her,” he continues. “Why would she tell everyone that I have a huge penis? So that every girl who sees my d**k for the rest of my life is disappointed.”
Davidson and Beckinsale were first spotted together at a Golden Globes after-party in early January. An eyewitness told ET at the time that the Serendipity star and the comedian spent at least an hour on a back patio chatting and laughing together.