Actress Courtney Cox posted two photographs on social media with former football superstar David Beckham on the set of "Modern Family", and this has "confused" her "Friends" co-actor Jennifer Aniston.

The photos were accompanied by the background music from James Brown's "Celebrity Hot Tub" and the caption: "Too hot in the hot tub! #modernfamily."

The first showed her and Beckham, while in the second, "Modern Family" stars Eric Stonestreet and Jesse Tyler Ferguson pile in, reports insider.com.

Stonestreet, who plays Cam on the show, commented on the post: "I liked it," while Ferguson, who plays Mitch, said: "Sorry I was so gassy."

However, other stars were quick to wonder what was going on in the photos.

Aniston commented: "Wait....What's Happening?" while actress Julianne Moore simply said: "What?"

Meanwhile, Beckham posted his own photo showing him and Cox reading a script, captioned: "I met a new FRIEND today at work @courteneycoxofficial #modernfamily."

With both stars set to feature on the show, "Modern Family" fans are in for a treat.

The post comes after Aniston made her Instagram debut with an epic selfie featuring her "Friends" costars on October 15, which she captioned: "And now we're Instagram FRIENDS too. HI INSTAGRAM."