Gabrielle Venora Petito (March 19, 1999 – August 27–30, 2021) was an American woman who was killed while traveling on a vanlife journey across the United States with her fiancé, Brian Laundrie.

The trip began on July 2, 2021, and was planned to last four months, when Petito disappeared in late August. After she went missing, Laundrie raised suspicion when he drove Petito's van from Wyoming back to his parents' house in Florida and refused to talk about Petito's whereabouts. The case gained national attention due to their social media activity, police body camera video footage, 9-1-1 emergency dispatch call recordings, and eyewitness accounts.

Laundrie was deemed a person of interest in the case and an arrest warrant was issued on charges of making withdrawals using someone else's debit card. He departed his home in North Port, Florida on September 13 and he was reported missing on September 17.

On September 19, 2021, Petito's remains were found at Bridger–Teton National Forest in Wyoming. According to the autopsy, she was killed by manual strangulation. After a month of speculation around Laundrie's whereabouts and an extended search of the area around his Florida home, his skeletal remains were discovered in the Myakkahatchee Creek Environmental Park on October 20. His cause of death is yet undetermined.