Terry Richardson is reportedly set to become a father.

The controversial photographer is expecting his first child with girlfriend Alexandra Bolotow, according to the New York Post newspaper's PageSix.

Alexandra, 30 - who has known Richardson for ten years and previously worked as his assistant - is said to be three or four months pregnant.

Terry, 50 - who has shot advertising campaigns for brands including Marc Jacobs, Tom Ford and Diesel and worked for magazines such as Vogue, Vanity Fair and Rolling Stone - and Alexandra have reportedly been discretely telling their close friends about their happy news.

Alexandra is said to have met Richardson while she was studying at New York University and became his intern before working for him full time.

She also appeared in 90 explicit photos by the fashion photographer in his 2005 book 'Kibosh'.

Richardson is best known for shooting stars from Barack Obama and Lady GaGa to Miley Cyrus and Beyonce.

Alexandra recently revealed how she and Richardson ''have a lot of conversations about things - the weird moral quandary of sexual things.''