Jennifer Aniston and Brad Pitt fans were in for a surprise after Aniston named ex-husband Pitt as one of her favourite guest stars on Friends.

Speaking to Access Hollywood about the upcoming highly-anticipated reunion, Jennifer, who played Rachel Green in the popular series, said: “Mr Pitt was wonderful. Fantastic.”

Brad had a cameo on the Season 8 episode, The One with the Rumour. He portrayed Will Colbert in the annual Thanksgiving episode and still hated Rachel from high school, which made for an awkward dinner. At the time of his appearance, the Oscar winner was married to Aniston. The pair began dating in 1998 and exchanged vows in Malibu in 2000 before splitting in 2005.

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Apart from Jennifer, actors Courteney Cox and Lisa Kudrow also spoke about their favourite guest stars. Courteney and Lisa named Paul Rudd, Tom Selleck, Ben Stiller, Reese Witherspoon and Alec Baldwin as amazing guest stars as well.

“I was blown away by so many,” said Kudrow when asked to name her favourite star.

Aniston described Ben Stiller as “hysterical” and deemed Reese Witherspoon (who played her sister Jill on the show) “brilliant”.

The special reunites Jennifer, Courteney and Lisa with co-stars David Schwimmer, Matt LeBlanc and Matthew Perry on screen for the first time since the sitcom ended in 2004.

The reunion was filmed on Stage 24, on the Warner Bros. Studio lot in Burbank, California, where the show was originally shot. It was set to be filmed in 2020 but faced delays due to the coronavirus pandemic.

It was announced last week that the reunion special will also feature a variety of guests including David Beckham, Justin Bieber, BTS, James Corden, Cindy Crawford, Cara Delevingne, Lady Gaga, Elliott Gould, Kit Harington, Larry Hankin, Mindy Kaling, Thomas Lennon, Christina Pickles, James Michael Tyler, Maggie Wheeler, and Malala Yousafzai.

WATCH – The trailer of ‘Friends: The Reunion’

Friends, which followed six friends in their 20s and 30s who live in Manhattan, New York City, originally aired for 10 seasons on NBC from 1994 to 2004.