The Black Hawk Down star is said to have found love with the model and actress.
© WENN
© WENN
A source told Life & Style magazine: "Josh doesn't usually bring his girlfriends home, so this one must be special. He's really into Tamsin."
Hartnett split from ex-girlfriend Amanda Seyfried back in April but has now moved on to a new relationship.
Hartnett and Egerton met on the set of new movie Singularity, which also stars Neve Campbell and Om Puri.
