An American comedian, actor, and television host, he gained fame on "Saturday Night Live" where he became known for his impressions and musical parodies. Transitioning to late-night television, he became the host of "Late Night with Jimmy Fallon" before taking over "The Tonight Show." Known for his charismatic and playful style, he has also appeared in films like "Fever Pitch" and "Taxi." His career is marked by a blend of humor, music, and celebrity interviews.