is one of the world's most well-known people
, but even she was taken aback on the set of the "Friends
The Phoebe Buffay
actor revealed she was ecstatic when Justin Bieber
made a guest appearance on the upcoming TV special, which will feature the main cast joined by celebrity "Friends" fans such as Bieber, Lady Gaga
, David Beckham, Malala Yousafzai, and Cindy Crawford.
Kudrow told the New York
Post of the "Baby" singer, "I was like, 'Wait, that's Justin Bieber, right? Would he be here? Is he here? He's really here – that's Justin Bieber!'"
“That was kind of exciting. I'm using the word 'kind of' to make myself appear a little cooler. It was exciting. I don't get excited about meeting people – but Justin Bieber, he's exciting.”
In addition to celebrity guests, the main cast will be joined by some of the series' supporting actors
, including James Michael Tyler and Maggie Wheeler, who play Gunther and Janice.
Elliott Gould and Christina Pickles (who portrayed Monica and Ross' parents, Jack and Judy Geller), Reese Witherspoon (who co-starred as Rachel's sister in two episodes of the sitcom), and Tom Selleck (who portrayed Monica's love interest, Richard) will join them.
The reunion is the first time all six of the main cast members have been in the same room together in front of the cameras since the show ended in 2004.
While filming the episode, Kudrow said she felt "every emotion."
“It was a lot of laughing and then real blubbering — which, I'm not sure if that will be in there, but the puffy eyes are in there, so that's good. It was an emotionally exhausting and great few days,” she told the New York Post.
for the episode debuted earlier this week, promising tears and laughter as Kudrow, Jennifer Aniston
, Courteney Cox
, Matthew Perry
, Matt LeBlanc
, and David Schwimmer reminisce about the iconic sitcom that catapulted them to global fame.
It also announced James Corden
as the reunion's host.
Here's the trailer: