COUGAR KATE’S ON THE PROWL!

She’s one of Hollywood’s most sought-after leading ladies and it seems sultry Kate Beckinsale is lapping up all the attention.

The 45-year-old Serendipity actress was spotted making out like a teenager in an LA nightclub with British comedian Jack Whitehall, 30, over the weekend. “Kate was having so much fun and didn’t care who saw them,” an onlooker reveals. “She looked incredible and heads were turning wherever she went.”

Dressed to the nines in thigh-high boots, fishnet stockings and a sexy mini-skirt, Kate – who shares 19-year-old daughter Lily Mo with ex-boyfriend Michael Sheen – looked every bit the yummy mummy on her hot date.

However, insiders say Kate is still dating her toyboy, comedian Matt Rife, 23!

“Kate’s playing the field and doesn’t want to be tied down - to Matt, Jack or any other guy for that matter,” a source tells Woman’s Day. “She’s having a blast.”