Angie's gonna blow sky high when she catches wind of this!

Brad Pitt "has been texting" with ex-wife Jennifer Aniston amid his bitter split and custody battle with Angelina Jolie, Us Weekly reports.

The Allied actor didn't have the Friends star's current phone number, but he tracked it down through a "tangled web" of mutual contacts and reached out to wish her a happy birthday on February 11. "They started talking once he wished her a happy birthday," a source dished to the mag.

"[Brad] has confided in Jen. Brad told her he’s having a hard time with his split and they exchanged a few texts reminiscing about the past," the source added.

The pair divorced in 2005 after five years of marriage, when the A-list hunk left her for his Mr. and Mrs. Smith co-star.

So how does actress' current husband Justin Theroux feel about this rekindled friendship? "Justin is OK with them being friends. He knows Jen just wants to be nice," the insider revealed.

Poor Brad could be hanging out smoking spliffs in Cabo with Jen right now, but instead he's busy paying for his mistake of running off with Angelina!