Are Cameron Diaz and Benji Madden Engaged?

Pair has been together for seven months

It appears that Cameron Diaz and Benji Madden might be tying the knot!

The actress and Good Charlotte rocker have been dating for seven months since stepping out publicly in May but sparked rumors of an engagement after Diaz, 42, started wearing a very special ring on that finger. Now sources are telling Us Weekly that the two could be getting hitched! (E! News has reached out to Diaz's and Madden's reps for comment but did not receive an immediate reply.)

"Benji always tends to fall in love easily, but this time it's for real and he landed a great girl," a source told the magazine. "They obviously both make each other incredibly happy and there's nothing better than that."

An eyewitness spotted the couple at JFK airport together Wednesday and tells E! News that they seemed "really happy," and that the ring in question does resemble an engagement ring, which would explain the ear-to-ear grin she wore on her face while traveling! The source also tells us that Madden was very attentive to her throughout their airport jaunt, noticing that she appeared very calm around her rocker love.

They have spent so much time together these days that it seems like they're in separable! After The Holiday actress hosted Saturday Night Live earlier this fall she and Madden, who is the twin brother of Joel, Nicole Richie's husband, looked smitten throughout the entire afterparty.

"They got there around 1:30 [a.m.] and spent the entire time together," a source previously told E! News. "They're very cute together, very intimate. There wasn't overt PDA, you can just tell they're really into each other."

No matter how in love they may appear, the relatively private couple has remained aloof when it came to addressing engagement rumors. She opened up to Cosmopolitan about love and her experiences with it—she has dated Justin Timberlake and Alex Rodriguez to name a few—and has learned a few things along the way.

"You have to find someone in the same place as you are. Timing is everything," she tells the magazine. "If you get into a relationship where you want something the guy doesn't want, it's never gonna work. You're never going to get him to be in that place. No matter how old you are, finding the guy who's in the same place as you are and wants to show up is the only way a relationship works, period."

Diaz knew Madden for years before they started dating, so maybe she's on to something! Either way, if they are indeed engaged, congratulations!