The medical procedural drama premiered in 1994 on NBC and ran for a staggering 15 seasons. See where the star-studded cast is ...

On the opening night of his Broadway debut "Good Night, and Good Luck," Clooney took many photos with all manner of ...

who all went on to have huge careers after the show ended its 15-season run. Below, see what the main cast of season 1 of ER has been up to since the show wrapped in 2009. Sven Arnstein/NBCU Photo ...

View post on Instagram "ER" served as the launching pad for the careers of all four actors ... but he returned throughout the season's run, including for the series finale in 2009.