The soccer star opened up about the experience on ‘Jimmy Kimmel Live’ on Wednesday, May 8

David Beckham was just as surprised about the Spice Girls reuniting as everyone else.

During an appearance on Jimmy Kimmel Live on Wednesday, May 8, the soccer star, 49, opened up about the girl group — consisting of Melanie “Mel B” Brown, Melanie “Mel C” Chisolm, Emma Bunton, Geri Halliwell Horner and Victoria Beckham — reuniting at Victoria’s 50th birthday last month.

David spedified that he actually put his wife’s birthday celebration together before host Jimmy Kimmel asked how long it had been since the Spice Girls sang together.

David Beckham; Spice Girls.JEFF SPICER/WIREIMAGE; RINO PETROSINO\MONDADORI VIA GETTY

y did the Olympics in the U.K. but over 15 years since they actually were on a stage together. So obviously having them all there that night, and I didn’t expect them to all get up on stage,” he said of the event.

David continued: “But I had a whole video planned where me and my kids recreated the ‘Mama’ video. My son, who plays the guitar and sings, had a song, and he sang ‘Mama,’ and all of a sudden all the girls got up — and I’m their biggest fan, you know? I tend not to tell my wife that. I tend to tell her that I fancied her, but she was a Spice Girl. I love that about her… So I was a fan.”

On Saturday, April 20, the fashion designer marked her milestone birthday with a star-studded bash in London.

David Beckham and Jimmy Kimmel.JIMMY KIMMEL LIVE/YOUTUBE

Following the festivities, her son Cruz Beckham gave fans a glimpse at his mother’s band teaming up again at the get-together to sing their 1996 hit “Mama” while he played the acoustic guitar.

“You’re welcome….” he captioned the Instagram post.

“Are we in tune? I’m not sure we are!” Mel B told the audience, while guests cheered.

From left: Gerri Halliwell, Mel. C, Victoria Beckham, Emma Bunton and Mel B. of the Spice Girls.VICTORIA BECKHAM/INSTAGRAM