Leno's Big Final Night: Largest Audience in More Than 15 Years TVWeek

NBC announced updated ratings numbers for Thursday's final installment of "The Tonight Show" with Jay Leno as host, and the total audience soared to 14.637 million viewers -- Leno's largest audience since May 1998.

Leading out from "Tonight," Jimmy Fallon's show delivered 6.0 million total viewers, the biggest number for a regularly scheduled "Late Night" airing since David Letterman's final episode in 1993.

Leno's total was his fourth-largest ever for "Tonight," and his largest since the night of the "Seinfeld" finale in May 1998, when Jerry Seinfeld was on as a guest and the show delivered 14.962 million viewers.

Leno also averaged a 3.8 rating in adults 18-49 Thursday night in fast-official “live plus same day” ratings from Nielsen Media Research.