Ali Fitzpatrick, from Minnesota, is livid after attending a friend's wedding where a complete stranger turned up and blocked guests' view of the couple during the entire wedding ceremony, the Daily Mail reported.
Fitzpatrick shared pictures of the stranger photo-bombing almost every photo to Facebook group "That's It I'm Wedding Shaming".
While posting several pictures of the perpetrator, she wrote: "A wedding I went to today had this lady all up in all the shots and she even went all around the couple and behind the altar to take videos and pictures.
"I didn't block out anything because I have the bride's approval as they were totally annoyed at this lady they barely knew. And she had to be asked several times to move by the photographer."
Some of the photos include the couple exchanging their vows while the stranger crouches down in front of them. Another shows her standing in the background while the bride does her wedding march.