Malcolm David Kelley is an American actor and a singer. He starred in the 2004 film You Got Served as "Li'l Saint". He also appears in the television series Lost as the character Walt Lloyd. A regular cast member in the show's first season, he appeared only occasionally thereafter due to a dramatic growth spurt. He returned for an appearance in "Through the Looking Glass", Lost's third season finale, and twice more in the fourth season, with the episodes "Meet Kevin Johnson" and "There's No Place Like Home", and reprised his role in the fifth season with the episode "The Life and Death of Jeremy Bentham". He reprised the role a final time in the Season 6 DVD box set mini-episode "The New Man in Charge".
He has also made appearances on Judging Amy, Law & Order: Special Victims Unit, My Name Is Earl, and Saving Grace.
In 2012 Kelley and his former Gigantic co-star Tony Oller joined up to form the pop duo MKTO.