Tracy Morgan underwent surgery Sunday to fix a broken leg he suffered in that fatal traffic accident over the weekend.

In a statement, his rep said, "While Tracy remains in critical condition, he has been more responsive today, which is an incredibly encouraging sign." 

The comedian sustained a number of injuries -- including a broken leg, a broken femur, a broken nose and several broken ribs. He's expected to stay in the hospital for several weeks. He's currently in the intensive care unit at Robert Wood Johnson Hospital in New Brunswick, New Jersey.

Tracy's friend, comedian and friend James "Jimmy Mack" McNair, died in the accident. His two other passengers were injured.