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Michael Sheen, Sarah Silverman

XPOSUREPHOTOS.COM

Look out! It seems like there's a new romance budding in Hollywood.

E! News has learned that Michael Sheen has been "hanging out" with Sarah Silverman over the past few weeks.

The two have been spending some quality time together, but as of now it's simply too soon to tell what's in store.

"They are hanging out and having a giggle," a source tells us. "We'll see if it develops into anything more. It's very new right now so it's hard to categorize."

Our insider added, "She really makes him laugh. I wouldn't call it dating, per se."

The two were most recently spotted together at Soho House on Feb. 6, shortly after the actor celebrated his 45th birthday at West Hollywood eatery Craig's.

Sheen's ex Kate Beckinsale attended the birthday bash, as well as his Masters of Sex costar Lizzy Caplan, Nicole Richie, Kate Hudson, and Demi Moore.

Silverman drove the birthday boy to his dinner and helped him unload his gifts into the trunk of her car.

The two both appeared casually dressed for the occasion, sporting similar cotton sweaters and worn-in jeans.

Sheen was previously linked to Rachel McAdams, while Silverman's dated comedians Kyle Dunnigan and Jimmy Kimmel in the past.

Reps for Silverman did not return our calls.