It's the most romantic holiday of the year! Or the sickliest, depending on your point of view.
Whether you think Valentine's day is cute or cringey, it's fun to have a nosey at the stars as they share their loved-up celebrations on social media...
Ronan Keating wrote to his wife Stormy: "HVD to my one and only. I love laughing our heads off and curled in front of the fire watching a flic.
"In this mad world we live in it’s the simple things that matter the most. Love ya Baby I’m such a lucky man to have you in my life."
The Saturdays star Una Healy posted a picture of two shadows, presumably herself and her new boyfriend David Breen, on a sandy beach with a simple love-heart emoji.
Nicky Byrne took to Instagram to post a picture of himself in the 2fm studio with a giant balloon, writing to his wife Georgina Ahern: "Every year she never fails! Happy Valentines Day to all you Lovebirds out there x"
Dancing with the Stars professional dancer Ryan McShane wrote to his model girlfriend Thalia Heffernan: "Happy #valentines day baby girl @thaliaheffernan ... The best and most beautiful things in the world cannot be seen or even touched. They must be felt, have a great day & I love you!"
She commented under the post: "Happy Valentine’s Day my love. Im sorry I’m not there, but you’re in my heart and on my mind all of the time.
"I love you, thank you for a beautiful Valentine’s Day eve yesterday xxxxx"
Gisele posted a picture of herself hugging her husband Tom Brady, writing: "Happy Valentine’s day! Te amo!"
Diane Kruger wrote to her boyfriend Norman Reedus: "To love @bigbaldhead ♥️ My Valentine ♥️"
Love Island winner Dani Dyer posted a cute photo with boyfriend Jack Fincham and wrote: "Happy Valentine’s Day baby I love you❤️ (really fancy you in this pic) Thankyou for being you♥️"
Geri Haliwell said she's "feeling the love" as she posed with a bouquet of flowers.
Rashida Jones posted a clip from Parks and Recreation, which invented the iconic holiday Galentine's Day, and wrote: "Happy Galentine's Day to all of you, regardless of what your current romantic status is...this day celebrates YOU and the love you share with your friends!! Best holiday ever! (I hope that doesn't sound sarcastic cuz it's not)"
Reese Witherspoon celebrated the same holiday when she posted a picture with her Big Little Lies co-stars Laura Dern, Nicole Kidman, Zoe Kravitz and Shailene Woodley and wrote: "True love is the love you have for your sisters, your girlfriends, your circle of strong women… and the ones who tell you that you have food in your teeth. Happy #GalentinesDay!"