"I love that s-", the 28-year-old said of the new pairing.
The comedian, who dated the stunner for a year back in 2017, spoke to TMZ, where he revealed his top tip for his ex's new man.
Asked if he had any advice for Davidson, whom he admitted he hadn't spoken to in some time, Rife said, "Run".
"A lot of ups and downs, but she's moved on and I'm hoping they've both found - or are getting out of it what they want to get out of it". "I hope they're happy". I wish them both the best. "I hope that it can build to where it's an established, good relationship".
Previous insider reports have been claiming that she really likes Pete and that she is not just a rebound for him after the split from Ariana.
The pair confirmed the romance by kissing passionately as they watched an ice hockey game together on Sunday at Madison Square Garden in NY.
Actress Beckinsale, the 45-year-old "Underworld" star, and Davidson, the 25-year-old "Saturday Night Live" comedian, seemed to confirm rumors of their relationship by kissing in front of thousands at Madison Square Garden on Sunday.
Kate and Pete have been the subject of relationship rumours for weeks.
Meanwhile, Kate previously dated actor Michael Sheen and the pair had a daughter, Lily, in 1999 before splitting in 2003.
And again, if you've been living under a rock for the past year, Antoni isn't just any random guy-he's the American treasure who now stars in Netflix's smash hit Queer Eye.
"Antoni is gay, if that helps clarify at all #queereye", Beckinsale commented.