It turns out that both shows have characters named Rachel Green(e), with the one on ER being Mark Greene's daughter, Rachel, ...

Wyle starred on 'ER' alongside George Clooney, Julianna Margulies and others for over 11 seasonsNoah Wyle is back in the ...

Noah Wyle looks back on his time playing Dr. John Carter on 'ER' and his crossover with 'Friends,' revealing to PEOPLE he was never aware of the two shows' Rachel connection.

From left: Jennifer Aniston, Courteney Cox, George Clooney and Noah Wyle on 'Friends' in 1996 ...