Robert Kelly Thomas (born February 14, 1972, in Landstuhl, Germany on a US military base) is an American rock recording artist, and songwriter. He is the primary songwriter and lead singer of the band Matchbox Twenty and formerly of the band Tabitha's Secret. Thomas also records and performs as a solo artist. Thomas earned three Grammy awards for co-writing and singing on the Carlos Santana triple-platinum hit "Smooth" on the album Supernatural in 1999.

He has also lent his songwriting talents to such artists as Willie Nelson, Mick Jagger, Marc Anthony, Pat Green, Taylor Hicks, Travis Tritt and Daughtry.

Since 1996, his band, Matchbox Twenty, has released a string of hit singles to radio including "Push", "3 A.M.", "Real World", "Back 2 Good", "Bent", "If You're Gone", "Mad Season", "Disease", "Unwell", "Bright Lights", and "How Far We've Come". In 2004, the Songwriters Hall of Fame awarded Thomas its first Starlight Award, recognizing young songwriters who have already made a lasting impact in the music industry.