Newlyweds have vowed to stay together — despite the bride discovering her new husband is actually her grandfather.

The couple made the shocking discovery three months after tying the knot while flicking through a photo album when they realized the man’s estranged son was also the bride’s father.

But the 68-year-old millionaire has said he has no plans to divorce his 24-year-old wife because he already has two failed marriages behind him.

The man, who doesn’t want to be named, proposed to his granddaughter on New Year’s Eve after they met through an online dating website.

He had apparently became estranged from the children in his first marriage and had moved away after his second marriage ended in divorce when he scooped up “several million dollars” as a lottery prize.

The Miami-based pensioner had signed up on the site looking for companionship and struck up the relationship with the 24-year-old, from Jacksonville, who said she had been kicked out of her family home.

He told the Florida Sun Post: “It was like a sense of deja vu, but at the time I couldn’t figure out why she seemed so familiar.”

Three months after they tied the knot, the couple reportedly discovered their family connection while looking through family pictures.

The bride said: “When I saw my father in that photo album, I just felt an overwhelming sense of despair.”

Shockingly, the pair have no plans to divorce and will instead try to make their marriage work.

The man said: “I’ve already had two failed marriages, and I’m determined not to have a third.”

His bride added: “Every couple is different and special in their own ways. I feel our bond is so strong that even something like this is not enough to make us give up.”