Geri Halliwell marked her 54th birthday with an unexpected celebration alongside Hollywood legend Meryl Streep. The Spice Girls member revealed their unlikely friendship on Thursday, posting photos from a special day spent on the set of the Hulu series "Only Murders in the Building."

Streep, 77, planted a kiss on Halliwell's cheek, a moment the singer described as "a moment I’ll always treasure." Halliwell expressed her gratitude to the show for making her birthday special, writing on Instagram, "The best birthday present ever. Spending my birthday with the extraordinary Meryl Streep was a moment I’ll always treasure. Thank you, @onlymurdershulu, for making it so special."

Halliwell has joined the cast of "Only Murders in the Building" for its sixth season, where she will appear with Streep, Steve Martin, Martin Short, and Selena Gomez. This acting role follows Halliwell's previous appearances, including a self-portrayal in the 1997 musical comedy film "Spice World" and a role in the 2023 sports film "Gran Turismo."

The pairing delighted fans, who flooded Halliwell's comments with reactions like "Wow wow WOW!!!," "ICONIC," and "This is blowing my mind."

In other recent Spice Girls news, Melanie Chisholm, also known as Mel C, recounted a humorous exchange with Halliwell regarding dress choices at her recent wedding. Mel C married model Chris Dingwall in a ceremony in the Lake District last month. Halliwell attended, along with Emma Bunton and Melanie Brown, though Victoria Beckham was absent due to a prior commitment at the World Cup final in New York with her husband, David Beckham.

Mel C shared that she had a brief conversation with Halliwell about her choice to wear white, Halliwell's signature color, to the wedding. "I did have a little chat with Geri because it is her favourite colour. She wears it every day," Mel C stated, adding that Halliwell wore a floral dress that was "white white." Mel C described the wedding as "perfect" and noted that while Victoria Beckham missed the event, she designed Mel C's wedding gown and stayed in touch with updates and photos from the day.