Wharton was born in Trinidad to a German mother and Trinidadian father.
[2] Prior to joining Working Title Films, Wharton served as an assistant to producer Eric Fellner, who would later co-own the company.
[3] Wharton later became a development executive for the company and, in 1999, established Working Title's subsidiary WT2 Productions as a production company that produced independent films.
[4] Films produced under the WT2 production banner include Shaun of the Dead, Billy Elliot, The Calcium Kid and Ali G Indahouse.
[3] Wharton left Working Title in July 2009.