THE second time’s a charm for Bradley Cooper and Zoe Sal­dana – friends say the reunited couple are back on, better than ever and planning to tie the knot!

“Bradley is telling friends he’s not going to let Zoe slip away this time,” said a close source. “Having lost her once, Bradley is ready to seal the deal on the relationship.”

The couple first met on the set of the romantic drama “The Words” after 37-year-old Bradley’s high-profile romances with Renee Zellweger, Jennifer Lopez and Jennifer Aniston fizzled.

They dated for three months before parting ways in March 2012. But by September, the two had reunited, and Bradley proposed to Zoe, 34, a few weeks ago – and she said yes! Bradley’s now telling pals he’s hoping that wedding bells will ring in late spring or early summer in his hometown of Philadelphia.

Though The ENQUIRER reported in May 2012 that Bradley’s mom Gloria was wrecking her son’s love life with her meddling, the source says she’s stopped butting in – and started helping. It turns out she’s the one who actually convinced Bradley to propose! “Gloria worked overtime to make it clear to Zoe that Bradley is a changed man and ready to commit,” main­tained the source.

“Gloria has been pestering Bradley that she’s desperate to be a grandmother. Zoe won major brownie points with Gloria when she promised that she’d start trying to get pregnant just as soon as Bradley proposed. That set the wheels in motion.”

Playing cupid isn’t the extent of Gloria’s involvement – Bradley’s been so busy lately he also sent her out shopping for the engagement ring, say sources.

“Now Gloria and Zoe are bonding over planning the ceremony,” added the source. “Zoe can’t wait to be Bradley’s bride.”