They seemed so young, so innocent and so in love.
But Kaley Cuoco and Ryan Sweeting filed for divorce in the early fall of 2015, ending 21 months of marriage and stunning millions of fans in the process.
We may never know for certain what went wrong, but we can at least look back on this relationship and smile over the good times they shared...
Kaley Cuoco and Ryan Sweeting Collage
They look so happy! In so many different poses! We never saw this split coming.
Kaley Cuoco and Ryan Sweeting at the Emmys
Kaley and Ryan pose here at the Emmys. They did always look great on the red carpet.
Kaley Cuoco and Ryan Sweeting after the Emmys
And also partying AFTER red carpet events. They seemed to have a blast in each other's company.
Kaley Cuoco and Ryan Sweeting Instagram Pic
And don't get us started on Instagram. Has any couple ever looked so in love on social media?
Kaley Cuoco with Ryan Sweeting Photo
We'll always have the Internet at least. These photos aren't going anywhere.
Kaley Cuoco Sweeting and Ryan Sweeting
Kaley was so crazy about Ryan that she adopted his last name. You don't often see this with celebrities.
Kaley Cuoco and Ryan Sweeting Halloween Costumes
The couple that gets dressed up for Halloween together does NOT stay together we guess. Too bad.
Kaley Cuoco and Ryan Sweeting Eating
The couple that dines together does not stay together, either. Too bad.
Kaley Cuoco-Ryan Sweeting Hospital Photo
They were so supportive of each other, especially when one half of the couple ended up in the hospital.
Kaley Cuoco and Ryan Sweeting Anniversary Photo
This is a picture of Kaley and Ryan on their anniversary. They failed to make it to two years.
How Sweeting It Is
How Sweeting It Is??? Come on, these two were set up for so many puns over the years.
Kaley Cuoco, Ryan Sweeting Instagram Pic
Kaley Cuoco and Ryan Sweeting on her Instagram page. Posing for pics is pretty much the only work he does!
Kaley Cuoco and Ryan Sweeting Old West Photo
HA! Like we said, they seemed to really have fun together.
Kaley Cuoco and Ryan Sweeting Birthday Photo!
Happy birthday! Tragically, the good times would not last for Kaley and Ryan.
Kaley and Ryan on Vacation
They did make time for each other, however, as evidenced by this snapshot of the stars on vacation.
Kaley Cuoco and Ryan Sweeting Save the Seals
Kaley and Ryan after a cycling/fundraising event to stop seal hunting. Kaley looks great without makeup.
Kaley Cuoco and Ryan Sweeting: Date Night!
This is a cute photo, right? Or is the look on Kaley's face signs that there is trouble ahead?
Drinking and Texting
Maybe this should have been taken as a sign. Put your drink and phone down. Truly spend time together.
Kaley Cuoco and Ryan Sweeting Image
Kaley and Ryan get cozy here on the beach. This was one of the first pictures snapped of the couple.
Might phone use have ended this relationship?!?
Kaley Cuoco With Ryan Sweeting
Kaley and Ryan were at a party here thrown by Joel Silver. It was early on in their relationship.
Kaley Cuoco and Ryan Sweeting at the Beach
This picture was taken about six months after Ryan and Kelly got married. Less than a year and a half later, they would be divorced.