Friend of the pair, Conrad Jack Carr, also shared images to his Instagram Story of the low-key celebration, which appeared to be at the couple's home.
In March, a source told Entertainment Tonight that Miley was planning a very secret, spur-of-the-moment wedding and that friends and family would only find out the plans at the last minute.
"She hasn't announced anything because she is being very secretive so only their friends will know and at the very last minute," they said. "This time they are doing everything their own way."
Congrats to the happy couple!