Kim Kardashian West has wished her estranged husband Kanye West a happy birthday and dec lared she will "love" him forever

Kim, who filed for divorce from Kanye - with whom she has North, seven, and Chicago, three, Saint, five, and Psalm, two - in February after seven years of marriage, captioned a throwback snap of them with three of their kids on a private jet: "Happy Birthday "Love U for Life! (sic)"

Kim's sister Khloe also took to her Instagram to post a sweet message to her "brother for life".

Alongside a holiday snap of Khloe, Tristan Thompson, Kanye and Kim, she

wrote: "Happy birthday to my brother for life!!! Have the best birthday Ye! Sending you love and endless blessings!! (sic)"

Momager Kris Jenner shared a snap of her and the hip-hop star on her Instagram Story and wrote: "Happy Birthday #kanyewest !! (sic)"

The birthday tributes come a day after Kim shared a new family portrait

- without Kanye.

The 'Keeping Up with the Kardashians' star posted the professional black and white photograph from her shoot with her four kids on Instagram.

Kim can be seen cradling son Psalm as a newborn, with North and Chicago to her left and Saint, five, to her right.

The mother-of-four captioned the post: "Baby Love."

Although they are divorcing, Kim and the 'Heartless' rapper are still said to be “getting along” with each other.

One insider explained: “Kim and Kanye are getting along. They have both stayed true to their commitment to make the best situation for the kids.

“Kim is very happy that they have managed to keep things calm. She thinks Kanye is a good dad. She wants him to be able to spend as much time with the kids as he wants."

During a recent episode of the family's E! series, Kim broke down in tears and admitted she feels like a "failure" while opening up about their split.

In a clip filmed last year, the Skims founder hinted that the reason for divorcing the 'Famous' rapper was because he "deserves" a wife who can travel from state to state with him.

Speaking to her sisters, she said: “I honestly can’t do this anymore.

“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.”

Kim also admitted she feels like a "failure" and a "loser" because this marks her third divorce after previous marriages to Damon Thomas and Kris Humphries.

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.”