ET reports that paparazzi caught the 43-year-old Underworld actress kissing Matt Rife, 21, outside of a lounge in West Hollywood. Rife is an actor and comedian best known for his time on the MTV improv comedy show Wild 'N Out.
The two reportedly met through a mutual friend and hit it off quickly.
"They quickly started flirting, went on their first date and it's continued since," a source told ET. "(They're) officially boyfriend and girlfriend."
One might think they would be some drama surrounding the couple due to the age gap. However, that doesn't appear to be the case.
The two are said to be very happy, with Beckinsale's family fully supporting the new romance.
"He is very mature for his age and is a great guy," the source said. "Everyone in Kate's circle loves Matt and are so supportive of this relationship. He really is the sweetest guy and makes her so happy! Her entire family thinks he is the nicest and most lovely person."
The two haven't publicly confirmed their relationship as of yet, but Rife did post a selfie that alluded to a special "summer love."
"Getchu someone who sings the whole Grease soundtrack with you in the car. Or die alone. Those are the only options. 🎶❤️" he wrote, adding hashtags for three of the film's love songs ("Hopelessly Devoted To You," "Summer Nights" and "You're The One That I Want").
Photo Credit: Getty / Dave J Hogan