GEORGE CLOONEY didn’t let a little thing like a steady girlfriend get in the way of a night of romance with “Bridget Jones’s Diary” star Renee Zellweger.

Renee, Jim Carrey’s ex-girlfriend, celebrated her 32nd birthday at a Los Angeles nightclub with a galaxy of stars including Tom Cruise, Jay Leno and Helen Hunt.

But it was Clooney, Hollywood’s hottest bachelor, who paid special attention to Renee, according to a source at the trendy Three Clubs nightspot.

“He was stuck to her like glue,” said the source. “They were making out and dancing very intimately.

“He was walking around the party holding hands with her like she was his girlfriend.”

Lady-killer George will have some explaining to do to steady girlfriend Lisa Snowdon, who was out of town. George and Lisa, a gorgeous British model, have been an item since the fall when they met while taping a TV commercial.

“George certainly wasn’t acting like a man with any commitments,” the source added. “His girlfriend was away, so George was ready to play!”