Kaley Cuoco and husband, Ryan Sweeting, have only known each other for less than a year, but they’re constantly proving just how in love they are. The Big Bang Theory actress has now made their marriage even more permanent, by getting a tattoo of their wedding date!

According to Us Weekly Cuoco has tattooed their New Year’s Eve wedding date, 12-31-13, in three rows of Roman numerals on her upper back. She first displayed this new tattoo at a charity tennis event in California on Saturday, March 22.

The two looked adorable at the event in their matching pink outfits, constantly smiling and high-fiving each other. Cuoco even posted a photo of the two hugging after the games on Instagram with the caption, “Had a blast playing a little mixed with @ryansweething tonight. A man who agrees to wear pink is a very very good man :).”

Sweeing returned the love with another photo of the two embracing in a hug on the court on his Instagram with the caption, “What a fun night! Luckiest man alive to have a wife that’s just the s%&t!! @normancook.”

Sweeting, on the other hand, has a lot more visible tattoos, including a matching Roman numeral one, which is right next to the love of his life’s name. “Kaley” is tattooed in giant cursive on his wrist next to the wedding date. He revealed this romantic gesture on his Instagram account about two months ago, right after their nuptials.

These two really are serious about each other, and now they have the ink to prove it!