Gregg Allan Wallace is an English television presenter, entrepreneur and writer. He is known for co-presenting MasterChef, Celebrity MasterChef and MasterChef: The Professionals on BBC One and BBC Two. He has written regularly for Good Food, Now and Olive magazines.

MasterChef is a British competitive cooking reality show produced by Endemol Shine UK and Banijay and broadcast in 60 countries around the world. The show initially ran from 1990 to 2001 and was revived in 2005 as MasterChef Goes Large. The revival featured a new format devised by Franc Roddam and John Silver, with Karen Ross producing. In 2008, the name was changed back to MasterChef but the format remained unchanged.