Miley Cyrus has opened up about her sadness at the loss of Jackass star Ryan Dunn, posting an emotional tribute online with a picture of the pair laughing together.

The TV prankster was killed in a high speed car crash in Pennsylvania on Monday and a number of stars have honored his memory including rockers Kings of Leon, who remembered Dunn on stage at a London show this week.

Cyrus has now revealed her own connection to the tragic funnyman, posting a picture on her Twitter.com page of herself sitting with Dunn and laughing hysterically.

She writes, "Just found this picture of me cracking up at Ryan Dunn. What a happy energy he had. RIP =["