Will Smith can't believe he's spent ''more than half of his life'' with Jada Pinkett Smith.

The 'Fresh Prince of Bel Air' star feels so lucky to be with the 'Girls Trip' actress and can't quite believe how long they've known each other for.

Taking to Instagram, Will wrote: ''I just realized... This year we've been together more than HALF OUR LIVES! @jadapinkettsmith (sic)''

Meanwhile, the 49-year-old actor previously insisted ''nothing'' could break his marriage to Jada, with whom he shares Jaden, 20, and Willow, 17.

He said: ''We don't even say we're married anymore. We refer to ourselves as life partners, where you get into that space where you realise you are literally with somebody for the rest of your life. There's no deal breakers. There's nothing she could do - ever. Nothing that would break our relationship. She has my support till death and it feels so good to get to that space.''

Will's comments echo similar statements made by his wife Jada, 46, who claimed last month that although split rumours frequently circle the pair, they're not even remotely close to ever calling it quits.

She added: ''I'm just, like, keep [the divorce rumours] coming. Here's the thing about Will and I - [we] are family. That is never going down. It's just not. Ever.

''We are family. Take out all that whole marriage/relationship crap, at the end of the day, Will and I are family. I am going to hold him down, doesn't matter. All that relationship and what people think ideas of a husband, partner and all that, man, whatever. At the end of the day, that is a man that can rely on me for the rest of his life, period.''