Lisa Kudrow admits becoming real life friends with her 'Friends' co-stars was "hard" work.
The 61-year-old actress - who played Phoebe Buffay on the iconic sitcom alongside Courteney Cox, Jennifer Aniston, David Schwimmer, Matt LeBlanc and the late Matthew Perry - has reflected on how their bonds developed after first being cast on the show, which ran from 1994 to 2004.