Gregory Lemont Ellis (born August 14, 1975) is an American football coach and former player.

Ellis played professionally as a defensive end for 12 seasons in the National Football League (NFL).

He played college football for the North Carolina Tar Heels, and was recognized as an All-American.

As a junior, Ellis was named second-team All-American by The Sporting News and was a first-team All-ACC selection after closing the season with 62 tackles and 12.5 sacks—the second most sacks in Tar Heels history, behind Lawrence Taylor's 16 in 1979.

Ellis was drafted with the eighth pick of first round in the 1998 NFL draft by the Dallas Cowboys, a selection which caused a great stir among Dallas Cowboys fans who were disappointed that the team passed on the opportunity to take Randy Moss.

In 2007 Ellis was selected for the NFC Pro Bowl roster and was named the NFL Comeback Player of the Year, acknowledging his return from a season-ending Achilles tendon suffered during the 2006 campaign.

The Cowboys decided to release Ellis on June 2, 2009, saving $4.15 million in cap space.

Ellis joined a Raiders line that would also include former Patriot and all-pro Richard Seymour.