TWILIGHT” star Peter Fa­cinelli is going full steam ahead with his plans to wed actress Jaimie Alexander – and he has the blessing of his estranged wife Jennie Garth!

Incredibly, sources say Jennie is OK with the screen hunk taking another trip to the altar so soon after their separation.

“Jennie wants to move on with her life and she wants Peter to do the same,” a pal close to the mother-of-three confided.

“She’s not bitter anymore and is only looking out for her kids’ future now. Jennie said if Peter is happy and in love, then he’s only going to make a better parent to her girls.”

The movie bloodsucker has been eagerly awaiting the finalization of his divorce from the 40-year-old for­mer “Beverly Hills, 90210” favorite so he can walk down the aisle with Jaimie, 28, as soon as possible, say friends.

“Peter’s absolutely crazy for Jaimie and has been for some time,” revealed a source. “And Jaimie’s nuts about him too!

“They’d been keeping their love a secret out of respect for Jennie and his kids because he didn’t want to hurt anyone. But now that the cat’s out of the bag, they’re heading for a wedding.”

Facinelli, 39,  flipped for Jaimie while they were mak­ing the film “Loosies” in 2010, but they really fell for each other last year on the set of the Show­time series “Nurse Jackie,” said the source.

Meanwhile, Garth and “The Twilight Saga: Breaking Dawn – Part 2” star announced their breakup on March 13.

Now his romance with Jaimie has revved into high gear. They were spotted together at the Eiffel Tower in Paris in August, according to sources.

“That’s when Peter told Jaimie he wanted to marry her,” said the insider. “They’re looking to finally tie the knot late next spring.”