Barack Obama is reminding Michelle Obama of her place in his life as she marks her birthday.

The former US First Lady turns 58 today and her husband took to Instagram to celebrate her.

He shared a beautiful photo of them together, with him kissing her cheek.

“Happy birthday, Michelle. My love, my partner, my best friend…” he wrote in the caption.

"My love, partner, best friend" Barack Obama celebrates Michelle Obama on her birthday