Hudson won an Oscar for her work in the movie musical "Dreamgirls." She also had a supporting role in the summer hit film "Sex and the City" and will soon be seen in "The Secret Life of Bees."
E! Online said Otunga is an ex-attorney and 2006 Harvard Law School graduate who was known as "Punk" on the reality television show "I Love New York 2."
Hudson and Otunga are both from Chicago.
"I can confirm that Jennifer got engaged to her boyfriend David on Friday night in Los Angeles," Hudson's representative told People magazine exclusively.
People.com said Otunga proposed by giving Hudson a Neil Lane diamond ring on her 27th birthday.