Is Jude Law's new baby mama a sexy model?! Believe it!

The mom-to-be is stunning actress/model Samantha Burke, 24, and she's carrying Jude's baby #4. Law has three other tots with ex-wife Sadie Frost. He apologized to fiancee Sienna Miller after having an affair with the nanny of his children.

Samantha, who has avoided the media, is due October 6th.