Kristin Cavallari's brother is missing.

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Michael Cavallari, the brother of the former The Hills star, hasn't been seen since his car was discovered abandoned on a highway in Grand County, Utah, People reported.

Police are reportedly searching for Michael, and according to a press release issued by the Grand County Sheriff's Office, his 2014 Honda Civic was found five miles south of exit 175 on I-70 on the Friday after Thanksgiving.

Michael resided in San Clemente, CA, and his most recent credit card transactions and surveillance camera footage show he last stopped at a Monticello convenience store.

Neither Kristin or her husband Jay Cutler, quarterback for the Chicago Bears, commented on this missing person case and ongoing investigation.

Kristin and Jay just recently welcomed a new baby, Saylor James, on November 23. She just posted a photo of her baby on Instagram Sunday, saying she was sad about missing out on her 10-year reunion at Laguna Beach High School.

Anyone with information about Michael is advised to contact the Grand County Sheriff's Office at 435-359-8115.
About The Author: Elizabeth Kwiatkowski
Elizabeth Kwiatkowski is Associate Editor of Reality TV World and has been covering the reality TV genre for more than a decade.