Anthony Michael Mortimer is a British singer, songwriter and record producer from London. He is a former member of the boy band East 17, who were originally active from 1991 to 1997 and sold over 20 million records worldwide. Mortimer wrote the band's only number-one single, "Stay Another Day".

East 17 are an English pop boy band started by Tony Mortimer, Brian Harvey, John Hendy, and Terry Coldwell in 1991. As of 2020, the group consists of Coldwell, Robbie Craig and Joe Livermore. East 17 have undergone multiple lineup changes, with Coldwell remaining the only constant member.