"It was unbelievable, so emotional," Cox told Ellen DeGeneres. Although the special is unscripted, Cox said it was the first time that the cast had all been together on a sound stage in over 15 years. "It was great—we had a lot of special surprises... it was fantastic, it really was," said Cox. The actress also discussed how she hated filming the Friends opening credit sequence. "It's not fun to be dancing in a fountain for hours and hours," she says. ALSO: Ellen DeGeneres reveals she's staying temporarily at Cox's house, but “I’m not having marital troubles."