Sandra Bullock is getting married to biker boyfriend Jesse James, reports celebrity portal Femalefirst.

The brunette beauty, who has romanced the "Monster Garage" presenter for over a year, is reportedly set to tie the knot next month in a secret ceremony, according to the US Weekly magazine.

Despite a spokesperson for the actress denying the nuptials, the magazine features a picture of Bullock with the words 'Sandra's Surprise Wedding'.

Rumours of a marriage, which the magazine claims will take place in Santa Barbara, California, started circulating earlier this year when James was reported to have proposed.

But the 40-year-old actress rubbished reports at the time saying: "Why is marriage the pinnacle for everyone? People get married for the wrong reasons. We need to start looking at different kinds of union, whether it's living with someone or being with six partners."