Director Guy Ritchie is reportedly engaged to wed his pregnant long-term girlfriend Jacqui Ainsley.

The 44-year-old filmmaker and the 30-year-old model have been dating for years and the couple share 13-month-old son Rafael together.

A source confirmed to Us Weekly magazine that Guy and Jacqui will marry one another.

On Sunday Jacqui was seen flaunting a diamond engagement ring over dinner at Los Angeles restaurant Madeo.

In July Jacqui revealed that she was pregnant with Guy's second child at the red carpet premiere of The Dark Knight Rises in London.

Guy divorced from superstar ex-wife Madonna in 2008.

He and the singer are parents to their biological child, son Rocco, 12, as well as adopted son David, seven.

Guy spoke last year about his experience being married to Madonna.

"I enjoyed my first marriage. It's definitely not something I regret," he told Details magazine.

"The experience was ultimately very positive. I love the kids that came out of it, and I could see no other route to take.

"But you move on, don't you? You're right, I stepped into a soap opera, and I lived in it for quite a long period of my life."