Jimmy Fallon (born September 19, 1974) is a prominent American comedian, television host, actor, and singer. He is best known for his work in late-night television and his long-standing career in comedy.

Here are the key highlights of his career:

• Saturday Night Live (SNL): Fallon first gained national fame as a cast member on SNL from 1998 to 2004. He became well-known for his impressions, musical parodies, and his frequent habit of "breaking character" during sketches.
• Late-Night Hosting: He transitioned to late-night television in 2009 when he took over Late Night with Jimmy Fallon. In 2014, he succeeded Jay Leno as the host of the iconic The Tonight Show, becoming the sixth permanent host in the show's history.
• Style: His hosting style is characterized by high energy, a focus on viral games (like "Lip Sync Battle" and "Wheel of Musical Impressions"), and a very friendly, enthusiastic rapport with his celebrity guests.
• Other Projects: Beyond television, he has appeared in several films, including Taxi (2004) and Fever Pitch (2005), and he has authored several successful children's books, such as Your Baby's First Word Will Be Dada.

Fallon remains one of the most recognizable faces in American media and continues to influence pop culture through his nightly monologues and digital content.