Spencer William Pratt (born August 14, 1983) is an American reality television personality.
In 2007, he began dating Heidi Montag, a primary cast member of the reality television series The Hills.
Subsequently, he came to prominence after being cast in the series.
Their relationship ultimately ended Montag's friendship with fellow cast member Lauren Conrad.
The ensuing feud among the three became the central focus of the series, and was carried through each subsequent season.
The couple, collectively nicknamed "Speidi," married in April 2009.
Later that year, they made controversial appearances on the second season of the American version of I'm a Celebrity...Get Me Out of Here! In 2013, Montag and he competed as a single entity on the eleventh series of the British version of Celebrity Big Brother, and returned to compete as a single entity on the nineteenth series in 2017.
Pratt formerly appeared on Wife Swap and The Spyson Hour, a weekly segment on the reality TV podcast Rob Has a Podcast.