Spice Girl Mel B spilled some serious tea during an interview with Piers Morgan, revealing that she bedded former Spice Girl Geri Halliwell years ago.

The 43-year-old made the shocking revelation for 'Piers' Life Stories' and the clip was aired on 'Good Morning Britain.'

Piers Morgan: “Did you or didn’t you with Geri Halliwell…did you sleep with her?”

Mel B: “Yeah, we all slept in a bed together but not ‘like that’ all of us.”

Piers Morgan: “Did you sleep with Geri ‘like that’?

Mel B: “She’s going to hate me for this because she’s all posh in her country house and her husband. But it’s a fact. It just happened and we just giggled at it and that was it. It was just that once. And hopefully, when Geri gets asked that, which hopefully she will after this, she won’t deny it. Because it was just a fun thing.”

Watch the confession below:

After spilling the tea, Mel B reportedly hopped on a call to Geri aka 'Ginger Spice' to smooth things over, but UK newspaper The Sun reports that Geri is unhappy with Mel.

Sources also claim that Geri has privately denied the allegation - and will deny it in a statement later this week.

A source told the Mail: "It's not a very nice thing to do even if you do have a book to promote.