Actor Dwayne Johnson thanked his mum for her longtime support by buying her a brand new car for Christmas.

The former wrestler and Fast Five star insists he owes his success to his beloved mother Ata, who struggled to make ends meet when Johnson was a teenager, and over the holidays the 40 year old splashed out on a special gift - a white Cadillac Suv, complete with a big red bow.

Posting a series of photos of his mum's surprised reaction on his Facebook.com page, he wrote, "At 14, I saw my mom crying about our only car being repossessed. This felt good, Merry Christmas, Mom."

And a source tells the National Enquirer, "Dwayne has a heart of gold and he lives his life like that every day. He has definitely done his mama proud."