Monica Geller altered the trajectory of the entire series, having life-changing effects on its characters. Summarizing the role of Monica in the series, Martin Gitlin wrote in his book "The Greatest Sitcoms of All Time" that while her friends "were ... just out to make the most of their social lives", Monica "sought to keep the others in line" while searching for "Mr. Right", who surprisingly turns out to be close friend Chandler. Several years before Monica and Chandler became romantically involved, Cox once joked in an interview that if her character were to ever have sex with another main character, it
Ross Geller 16 (17) episodes and was played chronologically: as an infant by Michael Gunderson Season 1 to 2, by brothers Charles Thomas Allen and John Christopher Allen from Season 3 to 5, and by Cole Sprouse from Season 6 to 8. Ross's daughter with Rachel, Emma Geller-Green, was born at the end of Season 8. Rachel's pregnancy was originally revealed in the season finale of Season 7. The conception of Emma was predominantly the result of a one-night stand, which was later revealed in the Season 8 episode, "The One With The Videotape". Ross claims to have "given up a career