Kristin Cavallari has shared an emotional tribute in honour of her late brother.

The 30-year-old star admitted she's had a ''hard'' week thinking about Michael Cavallari - whose body was found three miles away from his abandoned car on December 2015, with his passing later attributed to hypothermia - and her family's ''unexpected'' loss, but she's taken comfort in seeing some ''incredible signs'' from her beloved sibling.

She shared a photograph of them as children and wrote on Instagram: ''This past week has been hard -- it's the 2nd anniversary of losing my brother and even though the date we go with is the 27th, for me it will always be the Saturday after Thanksgiving (we will never truly know the exact date even though we have a pretty good idea).

''We lost him completely unexpectedly and it's been a rough road for me and my family. I've had some incredible signs from him though -- which give me a lot of peace -- including one today (candle emoji). We love and miss you everyday Mikey.''

The former 'Laguna Beach' star - who has children Camden, five, Jaxon, three, and two-year-old Saylor with husband Jay Cutler - previously paid tribute to her beloved brother after his body was found, admitting the tragic loss had left her heart in a ''million pieces''.

She posted at the time: ''My heart is in a million pieces. Mikey, I could always count on you to make me laugh. You had such a good heart and will be forever missed. I'm at a loss for words but I know u are in a better place and finally at peace. I love u so much RIP. (sic)''