Terri Seymour (born Theresa Helene Seymour in 1974 in Hertfordshire, England) is a British television presenter and sometime actress best known for being the girlfriend of The X Factor and American Idol judge Simon Cowell since 2002.

She first found success as a commercial model appearing in catalogues and commercials, though first came into the public eye when she became co-host of Wheel of Fortune on the British television network ITV from 2000 to 2001.

In 2000, Seymour appeared in the television film In the beginning and in 2002 played a small role in the British film 24 Hour Party People.

Seymour has recently been seen as a correspondent on the popular US entertainment news show Extra and occasional reporter on ITV2's The Xtra Factor and This Morning. In 2006, she made a special guest appearance on The Tyra Banks Show as a judge in a search for the next top male model and played herself in the film Material Girls.

In late 2002, Cowell started dating longtime friend Terri Seymour. In 2006, British newspaper News of the World reported that he had cheated on Seymour with model and socialite Jasmine Lennard, and printed photos of her leaving his home. Photos of a visibly irate Seymour (who was in the US when the story broke) being met at the airport by Cowell were later published in Heat. However, both Cowell and Lennard, who was also in a relationship, denied that anything untoward had occurred, and attributed the meeting to business.

She is the American Idol correspondent for FOX 11 in Los Angeles.

Girlfriend of Simon Cowell.