The actress (yes, she really is 50) turned heads in top-to-toe suede at the premiere of Just Before I Go, the first film Cox has directed, as she posed with her 38-year-old partner Johnny McDaid.
The Friends star completed her simple but striking LRD (that's little red dress) with black suede sandals and a matching shoulder bag. She was joined by stars of the film Seann William Scott and Kate Walsh as well as her 10-year-old daughter, Coco, who looked super cute in ripped jeans and turquoise heels.
Courteney's ex-husband David Arquette also attended the event with his new wife Christina McLarty, along with her close friend Jennifer Aniston.
So, are wedding bells on the cards for Courteney and Snow Patrol star Johnny? After the couple got engaged in 2014, it's thought they will also get hitched this year.
Johnny proposed in June whilst the two were on a romantic getaway in Turks and Caicos to celebrate Courteney's 50th birthday. And the ring was a big hit.
Courteney's jewellery designer friend Jenny Meyer Maguire (she's Tobey Maguire's wife) posted a picture of the sparkly rock on her Instagram page with the caption 'I guess he liked it so he put a Jennifer Meyer ring on it!! Xo'.
Love a bit of bling? There's plenty more below...