See the star's sparkler!
Credit: Rob Latour/REX Shutterstock; Inset: Lisa O'Connor/Zuma

Rob Latour/REX Shutterstock; Inset: Lisa O’Connor/

Congratulations, Lizzy Caplan and Tom Riley! The Masters of Sex actress and her British actor boyfriend are set to become Masters of Marriage.

Although the pair have been engaged since May (according to E! News), and Caplan wore her new ring to the Now You See Me 2 premiere in June, it wasn’t until the Ghostbusters premiere in L.A. that we really got a good look at her beautiful ring.

The 34-year-old actress proudly paired her sparkling new accessory with a plunging printed white Erdem dress and a mini black handbag adorned with a gold chain (the better to rest her newly-adorned hand on, of course).

RELATED VIDEO: How It’s Done: Winged Liner

The happy couple first made their red carpet debut at the Prague Opera Ball in February, just a year after they met in January 2015 while Caplan was filming in London.

Caplan isn’t the only Mean Girls star to be heading down the aisle soon. Former castmate Daniel Franzese, who played BFF Damien to her Janice Ian in the 2004 film, popped the question to his now-fiancé Joseph Bradley Phillips with a thick, squared-off gold band with a single stone. (If they decide to have a joint bachelor/bachelorette party, we’re going to need an invite.)

What do you think of Lizzy’s ring? Share below!

–Sarah Kinonen