Mel C, popularly known as Sporty Spice, was unable to attend Mel B's wedding as she was booked to perform at a music festival in Sweden.
Chisholm, 51, took to Instagram and shared a heartfelt message alongside a photo of the newlyweds.
"So, so happy for you both, and beyond gutted I couldn't be there. Excited to celebrate with you really soon! Yippee!" she wrote.
The Spice Girls star, Mel B, widely recognised as Scary Spice, recently tied the knot with her long-time partner, Rory McPhee, at St Paul’s Cathedral in London.
The star-studded guest list included model Cara Delevingne, comedian Katherine Ryan, and music mogul Simon Fuller.
Emma Bunton, aka Baby Spice, was the only Spice Girls member to attend the ceremony.
Meanwhile, other fellow bandmates—Melanie Chisholm, Victoria Beckham, and Geri Halliwell—were notably absent from the high-profile event.
Beckham also congratulated Mel B via social media, writing: “I couldn't be more excited for you both and wish you a lifetime of happiness!”
An insider previously revealed to MailOnline that Beckham had “long-standing plans outside the country” and that there is no conflict between the Spice Girls.
“It’s just one of those things,” the source stated.