Unfortunately, they had a very sad ending. Fred was killed during the Battle of Hogwarts, and as confirmed by J.K. Rowling, George never fully got over his brother's death, and named his first son after him.

Does Fred or George die in the movie?

Cause of Death: Fred died in an explosion outside the Room of Requirement during the Battle of Hogwarts, though only the aftermath of his death is shown on-screen in the movie. Although his actual death isn't shown in the movie, the aftermath of his family finding his body in the Great Hall is.

Why did Fred die instead of George?

Fred Weasley

Incidentally, Fred was chosen to die over his twin George because he was the slightly more conspicuous brother. ... So [readers] might have thought that George would be the more vulnerable one and, therefore, the one to die,' she once said.