As Jennifer Aniston turns 40 today, she'll no doubt be surrounded by those who love her — and that includes the man in her life, rocker John Mayer.
And while in her new movie, He's Just Not That Into You, she plays a woman stuck in a go-nowhere relationship, the same cannot be said for the actress' real-life romance with her 30-year-old beau. And just in time for Jen's big birthday, it looks like John will finally give his lady love the ultimate gift: a marriage proposal!
"Jen and John are slipping away on a romantic getaway," an insider tells OK!. "And John's going to give her the ultimate surprise for her 40th — a gorgeous engagement ring!"
But taking that step towards marriage wasn't always a foregone conclusion for the hot-and-cold pair, who first hooked up shortly after Jen's 39th birthday last year.
At the time, John — whose playboy past includes flings with Jessica Simpson, Minka Kelly and Jennifer Love Hewitt — wasn't quite ready for monogamy. And after a sizzling summer with Jen, John called things off in August — only to quickly realize he'd made a mistake.
"He begged and pleaded with Jen for another chance," a source close to the Grammy winner tells OK!. And while the actress did eventually take him back, a pal of the former Friends star says "Jen made it clear that she wanted their relationship to be on the marriage track."
Though they recently split again for three weeks following their New Year's getaway to Mexico, the couple decided to recommit to their relationship. Jen, in particular, drew a line in the sand.
"She made it really clear to John what her rules are," a friend tells OK!. "And John had no problem agreeing to whatever she wanted."
For all the details on Jen and John's romance, pick up the new OK! — on newsstands everywhere Thursday!