"They have been dating for a few weeks," a source close to the actress told E! News. "He is on tour still but they have been on a few dates when he is in L.A. It's not serious but she is having fun."
E! News had reached out to Lake and Chris' reps for comment but has not heard back.
The news comes after Lake, 43, and the comedian, 57, were spotted out and about together multiple times throughout the Fourth of July weekend. The couple's holiday kicked off on July 2 when they were seen grabbing a bite to eat at Giorgio Baldi in Santa Monica, Calif.
At the time, an eyewitness told E! they were holding hands when they first arrived at the Italian restaurant, but kept a low-profile throughout their meal.
The following day, the pair stopped for lunch at the Coast Restaurant. In pictures, posted by TMZ, Chris and Lake both looked comfy and casual in matching white t-shirts.
Their romance comes almost two years after Lake announced that she and tattoo artist Scott Campbell—they share daughter Nova, 7, and son Ozgood, 5—would be going their separate ways after seven years of marriage.
"With respect and thoughtful guidance," she wrote on Instagram at the time, "we will continue to be parental comrades in arms and best friends for all of our days."
Chris is a family man himself. The Madagascar star is dad to daughters Lola, 20, and Zahra, 18, with his ex-wife Malaak Compton-Rock. The pair were married for 18 years before separating in 2014.