Love it or hate it, there's no denying that today is one of the most romantic days of the year.
Couples around the world will be marking Valentine's Day with flowers, chocolates and gifts, as it's a day devoted to celebrating romantic love.
The tradition of sending Valentine's Day cards in particular dates all the way back to the Roman Empire.
Emperor Claudius II had banned his soldiers from getting married, as he thought having wives and families would make them poor fighters.
Valentine, who was a priest, thought this was unfair. He continued to perform marriages in secret, but was eventually discovered and sentenced to death.
Before his execution he sent one final note to the woman that he loved - signed "from your Valentine".
If you're not sure what to write in your Valentine's Day card this year, look no further than these romantic quotes.
Valentine's Day quotes
You are my heart, my life, my one and only thought.
- Arthur Conan Doyle
You know you're in love when you can't fall asleep because reality is finally better than your dreams.
- Dr Seuss
We loved with a love that was more than love
- Edgar Allen Poe
It would be a privilege to have my heart broken by you.
- John Green
If you pressed me to say why I loved him, I can say no more than because he was he, and I was I
- Michel de Montaigne
Love is friendship that has caught fire.
- Ann Landers
Lovers don't finally meet somewhere. They're in each other all along.
- Rumi
Whatever our souls are made of, his and mine are the same
- Emily Bronte
If I had a flower for every time I thought of you ... I could walk through my garden forever.
- Alfred Tennyson
If you live to be a hundred, I want to live to be a hundred minus one day so I never have to live without you.
- A.A. Milne
Loving is not just looking at each other, it’s looking in the same direction.
- Antoine de Saint-Exupéry
I carry your heart (I carry it in my heart)
- E.E. Cummings
The best thing to hold onto in life is each other
- Audrey Hepburn
Happy Valentine's Day!