By Breaking Celebrity News Staff

Happy Birthday George Clooney!

To celebrate 51 years of one of our most popular-ever leading men, Breaking Celebrity News is looking back at Clooney's Hollywood highlights

He was already a sitcom staple with a decade worth of credits when he switched to drama and set hearts racing in 1994 as hunky Dr. Doug Ross on ER and his five year stint led to a whole lot more than being a TV hunk.

With an Oscar under his belt for movie thriller Syriana and three other Academy Award nominations for best actor, George has become one of the most critically acclaimed stars.

His good looks and cheeky charisma have also made him a hit with the ladies , having dated a string of beautiful women including Lisa Snowdon, Elisabetta Canalis and most recently former Dancing with the Stars contestant Stacy Keibler.

But his popularity doesn't just stem from his acting and his love life, he's also dedicated to a good cause.

George is an advocate for the resolution of the Darfur conflict and in March 2012 he was arrested outside the Sudanese Embassy for civil disobedience during a protest.