Lydia is a woman giving birth in "The One With The Birth". She was portrayed by Leah Remini.
Lydia gives birth to a daughter. Joey stays with her while she is giving birth, taking the place of the father (Roy), who was not there, but came later. She is a fan of the basketball team Boston Celtics, while Joey likes the New York Knicks, causing a friendly argument between the two.
Lydia and Roy after the birth of their daughter.