They've been dating for a year. 

And Guy Ritchie and his model girlfriend Jacqui Ainsley have reportedly taken their relationship to the next step with news that the 29-year-old is pregnant.

She is said to be due in September, providing a half sister or brother for Guy's children with Madonna.

The baby would be Guy's second biological child following ten-year-old Rocco, the fruit of his seven-year marriage to Madonna.

The director is also father to their adopted son from Malawi, six-year-old David.

A friend told the Daily Mail: "They have been very keen to start a family. We expect to hear wedding bells next year."

And it seems the model's dreams have come true - in January she told Tatler: "I've known since I was very little that I want to be a mummy."

Photo: © Rex