Chrissy Teigen and John Legend. Picture: Reuters

Chrissy Teigen "had sex" with John Legend the same day they met.

The 33-year-old model left 'Celebrity Family Feud' host Steve Harvey speechless when she went into detail about how well she and her now-husband got to know one another after she appeared in the video for his 2006 track 'Stereo'.

Discussing how they met on the shoot, John said: "Yeah, in 2006, and we're still together."

His wife hilariously added: "We did the video, and then we had sex. I went to your hotel and there was a..."

To which her spouse interjected: "Uh, wha... It's a family show."

The 'Lip Sync Battle' Host added: "Do you want to hear it, though, or not?' "

The 'All of Me' hitmaker stopped his wife from sharing any intimate details and simply concluded: "We got along very well."

Chrissy - who has three-year-old daughter Luna and 12-month-old son Miles with her spouse - previously admitted that she was left stunned when she met John for the first time because he was doing his own ironing in his dressing room.

She said: "I walked into John's dressing room to meet him, and he was ironing in his underwear.

"I said, 'You do your own ironing!?' He said, 'Of course I do.' I gave him a hug. I'm not going to lie. We hooked up." 

The cook book author also went on to share that she "played it cool for a long time" because she wanted him to be sure that she was the one.

She continued: "I let him be himself for a while. The worst thing you can do is try to lock someone like that down early on, then have them think, 'There's so much more out there.' I played it cool for a long time."