Fashion designer and former reality-TV star Whitney Port has gotten engaged, People magazine said Thursday. Her representative confirmed that the one-time star of MTV's "The Hills" is marrying Tim Rosenman, who has worked in TV production, including on her spinoff series "The City" as well as on Fox's "The X Factor." The two began dating in 2012. Port, 28, previously dated Ben Nemtin, executive producer and a star of the MTV reality show "The Buried Life," until June 2011.