In honor of the most romantic day of the year, here are ten of the hottest and most popular celebrity couples of 2015.

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Some of these couples may have developed a relationship fairly recently while others have been together for years. This includes Hollywood stars Ben Affleck and Jennifer Garner who are almost at a decade of marriage.

The two of them still seem to be very much in love ever since Affleck told Loaded how grateful he is for his wife and how she's helped him further his career.

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"Getting to know Jennifer, falling in love with her and being connected with her gave me a foundation to reach out and say, okay, I'm going to do Hollywoodland," the actor said, posted on Daily Mail. "I'm going to direct Gone Baby Gone. Those were the steps forward I needed to put positive stuff on the board."

Another big couple this year is Channing Tatum and Jenna Dewan who have been married for five years. They have a one-year-old daughter named Everly.

Check out the slideshow to see some more of the biggest celebrity couples of 2015.