It is every fiance's worst nightmare, the prospect of arriving at their wedding only to find their other half is a no-show.
And although it is a rarity it does happen as these shocking confessions reveal.
However, these revelations from Reddit users come, not from those who have been jilted but by those who decided to call it quits on their wedding at the last minute.
User Roxanne357 asked "Redditors who have left your fiance at the altar, why did you do it and what happened?"
User Fluffledoodle revealed "I left a man at the altar. I was in my dress and getting ready to go to the chapel, when I realized I couldn't."
"I froze. I didn't love him as much as I craved the safety and security that being married would bring. I was fairly recently divorced and very young and scared.
"He eventually found a lovely woman and they are very happy together. I don't think either of us would have had that with each other."
Although few admitted to actually leaving their betroved at the altar itself some confessed to waiting until the last minute to break off the marriage.
User Scrappy_Larue said "Not at the altar, but I bailed just two days before we were headed to city hall.
"It was a green card marriage. On our second date she mentioned that her visa was expiring in six months, and I jokingly proposed to her.
"We continued dating, were falling for each other, and that proposal became much more real as the deadline approached. I backed out at the last minute because we just didn't agree on a few details. Living arrangements and finances were easy. What couldn't be negotiated was how seriously either of us wanted to take those vows.
"I wanted to at least attempt to be a married, monogamous couple. She didn't really want to commit to that. If she falls deeper in love, great. If not, we're just roommates.
"I miss her, but I think I dodged a bullet. I believe she would have vanished on me at some point, and I could be in a real jam over immigration crime."
In a similar confession falto1 revealed that she had very goof reason to abandon her marriage plans.
She wrote "Not quite at the altar, but I was left several weeks before my wedding. And by left, I mean my fiance insisted he was stressed out with work and needed some time... when in reality he wanted to move his new, pregnant girlfriend into our house while I was out of town."
She added that while she knew she had made the right decision she was equally heartbroken by the loss of trust.
She continued "The initial aftermath was indescribable, frankly - about 85% of our wedding was set up - calling and explaining this to vendors was a total blast.
"Not to mention the crippling depression I fell into and loss of a whole life I had built with someone I had trusted. I didn't leave my parent's house for over a month afterward."
She later added "I know I'm better off and dodged a huge bullet. I also recently started seeing a man who makes my heart race when he walks into a room. It's a beautiful thing."
Other stories came from those who knew someone who had left their fiance on the day of their wedding.
User trjones1 said "A guy I knew did this. He was a nice, laid back guy marrying a toxic person.
"His friends had been telling him to break it off from the beginning. They had a final intervention for him the morning of the wedding and they finally convinced him to just leave.
"He showed up at this festival I was at during what was supposed to be his wedding. I saw him and said 'Hey man, aren't you getting married today?' and he had this kind of far away look and said 'Yeah, that's not happening anymore.'"
Perhaps the most shocking confession came from DarkOmen597 whose good friend abandoned his bride after he arrived at the church.
He said "A buddy of ours was going to marry this girl he had known for a few years. He was expressing doubt but racked it up to being nervous about marriage.
"The night before he broke down crying and thought he was making a mistake. We offered support and told him it would be ok. We said that if he didn't want to do it he didn't have to but we encouraged him to go through with it.
"Day of the wedding and everything is happening. The wedding has started and he is at the Altar waiting. My buddy is sweating like a mad man. My other friends and I notice and think he is about to pass out. Then it happens.
"The groom starts rocking back and forth. He looks like he is about to faint and he slowly starts side shuffling. My buddies look at each other and just know what is about to happen. The groom turns to his right and starts heading to the side door.
"Some people in the church notice and there is a gasp. He beelines to the door and goes out side. Me and my buddies follow him. At this point i just thought he needed air. Nope. He heads straight towards the sports car he had rented."
The user then reveals that after abandoning his big day he and his friends headed to Las Vegas for several days before the groom decides to join the military.
Another heart breaking confession came from someone who had in fact been left at the altar.
User katrilli said "I got left at the altar. He had spent the previous day spending a lot of time with his ex instead of helping me set up.
"I yelled at him about it because he was late and hadn't helped at all. He said he didn't want to get married because spending time with his ex made him realize I wasn't as fun as she was because I was uncomfortable with him doing drugs.
"Kicked him out and still had the party. I told him to use that time to go home and pack up all his s***. He did. Then he got into crack and other s*** so yay."