British model Cara Delevingne has shared a series of intimate photographs on her Instagram account to celebrate her girlfriend Ashley Benson’s birthday.

The collection of snaps, which document their 19-month romance, include a picture of the couple kissing in a bathtub.

In the caption accompanying the post, Cara wrote, “Happy birthday @AshleyBenson There is so much I could say but something I love and cherish most about us is that I don’t need to because YOU KNOW and that’s all that matters.”

She went on to express her admiration for Ashley, saying, “It’s you and me which is my favourite. My safe place.”

“You let me be silly, you let me be wild, you keep me free, secure and curious.”

Cara also shared a number of affectionate nicknames for her girlfriend, writing, “I feel like I’ve known you my entire life and I am so proud of watching you grow into the woman that you always dreamt of being.”

“I love you beyond words my sprinkles, choonchi, angel face, grumpy a*s, sweet cheeks, never boring, buttmunch, Benson.”

Ashley responded to the post by writing, “Love you my choonchie pet. My best friend. My kween.”

Cara and Ashley live together in a house that the model shares with her elder sister, actress Poppy Delevingne.

The sisters purchased the property in 2017 for £1.56million from actor Jared Leto.

Poppy has said that she was the one who inspired the design of the house, stating, “Basically, I’m a control freak.”