Mark Ruffalo celebrates his ‘best friend’ and wife Sunrise Coigney’s 51st birthday with

Mark Ruffalo posted a touching tribute for his wife Sunrise Coigney’s 51st birthday on Sunday.

The actor, 55, shared several photos of his longtime partner and penned a lengthy message to wish his ‘best friend’ and ‘the most fun and exciting person’ a happy birthday.

The Avengers star — who stunned a British couple by ‘gatecrashing‘ their New York wedding earlier this year — gushed about the actress in his latest Instagram post.

‘Happy 51 to my best friend, my partner in all, the most fun and exciting person I have ever known,’ he wrote in his caption. 

‘So happy we found each other and held on for dear life through everything that came and has left,’ the three-time Oscar nominee continued.

Birthday tribute: Mark Ruffalo posted a touching tribute for his wife Sunrise Coigney’s 51st birthday on Sunday

Cute couple: The actor, 55, shared several photos of his longtime partner and penned a lengthy message to wish his ‘best friend’ and ‘the most fun and exciting person’ a happy birthday. He shared an adorable photo of himself taking a photo of his wife as they were sitting at a dinner table together

‘It’s good to know you and be known by you,’ he added. ‘The world is a brighter place in your presence and beauty. Happy happy birthday, pal.’ 

In the carousel, he posted a double-exposed photo of his wife standing in front of a beautiful sunrise and scenic view. 

He also shared an adorable photo of himself taking a photo of his wife as they were sitting at a dinner table together. 

Another candid snap showed the In The Cut star beaming radiantly and holding onto a champagne flute. 

He also posted a photo of her in a sexy plaid dress as she looked away from the camera.

As part of the montage, he shared another throwback photo of her standing in a red dress with her arms up in excitement. 

He also shared a stunning photo of her sporting a straw hat and illuminated by red lighting.

Previously, the couple met during a love-at-first-sight moment after bumping into each other on the street in Los Angeles back in the late ’90s.

Candid throwback: Another candid snap showed the In The Cut star beaming radiantly and holding onto a champagne flute

Admiring his wife: He also posted a photo of her in a sexy plaid dress as she looked away from the camera

Artsy: In the carousel, he posted a double-exposed photo of his wife standing in front of a beautiful sunrise and scenic view

Radiant: He also shared a stunning photo of her sporting a straw hat and illuminated by red lighting

The pair tied the knot back in June 2000 and celebrated their 23rd wedding anniversary earlier this year. 

The pair share three children together — Keen, 22, Bella, 18, and Odette, 15.

In November 2019, he spoke to People and credited his wife as a ‘hero’ for holding down the family. 

‘It’s intense,’ he told the outlet. ‘The times when my wife is gone and I’ve had to take care of everything.

‘The laundry alone is enough to destroy you,’ he joked.