The 40-year-old reality TV star posted the message to Kanye on her Instagram. She wrote: “Happy Birthday Love U for Life!”
The SKIMS founder also shared several images of the couple and their four children - North, seven, Saint, five, Chicago, three, and Psalm, two.
The star’s mother and manager and matriarch of the family, Kris Jenner, also wished her former son-in-law well. birthday. “Happy birthday Kanye West,” she wrote under a picture of the pair together.
Her sister Khloe, 36, also posted a message. “Happy birthday to my brother for life!!! Have the best birthday Ye! Sending you love and endless blessings!!”
Kim filed for divorce from the rapper and fashion designer in February citing irreconcilable differences.
Reports recently have suggested that Kim and Kanye are “getting along” with each other as they work through their divorce.
One source said, according to Mail Online: “Kim and Kanye are getting along. They have both stayed true to their commitment to make the best situation for the kids.”
Meanwhile, in a recent teaser from an episode of Keeping Up with the Kardashians, the star broke down in tears over her failing marriage with Kanye.
The reality TV star sobbed as she told her sisters she felt like a failure during the break-up of her relationship with the father of her four children.
Fans were given a glimpse into their marital woes in the latest episode of Keeping Up With The Kardashians, as the businesswoman cried over West’s move from California to a ranch in Wyoming.
“I honestly can’t do this anymore,” she said through tears. “Why am I still in this, like, place where I’m stuck for years? Like, he goes and moves to a different state, every year, I have to be together so I can raise the kids, you know? And he’s an amazing dad, he’s done an amazing job.”
Kardashian West said West, her third husband who she married in 2014, “deserves” a wife who can follow him across the country.
She added: “I feel like a f****** failure, that it’s like, a third f****** marriage. I feel like a f****** loser. But I can’t even think about that like, I want to be happy.”
Earlier in the episode, filmed last year, Kardashian West’s sister Khloe Kardashian told the cameras the toll the doomed marriage had taken.
She said: “Kim is one of the most incredible human beings, literally ever, and she tries to protect their union at all costs, but it’s hard when you carry that responsibility on your shoulders and I just want her to take care of herself too.”
The episode was the penultimate Keeping Up With The Kardashians and the family took a break at a resort in Lake Tahoe to commemorate the series.
It is coming to an end after 14 years and 20 seasons, with the final episode due to air next week.
The family organised a game of secret Santa, with the presents having a link to the show.
Kardashian West was given diamond earrings – a reference to the famous moment she lost one in the ocean.