Kylie Jenner has called for prayers for Lamar Odom.

The 18-year-old reality star has shared her support for her half-sister Khloe Kardashian's ex-husband, who is fighting for his life after being found unconscious in a brothel on Tuesday (13.10.15) and expressed her wish for them to hang out again soon.

Alongside a picture of herself and Lamar dancing, she wrote: ''Let's dance again together soon. Prayers up for Lamar please.''

Kylie's sentiments were echoed by her half-sister Kourtney Kardashian, who shared an old picture of the 35-year-old basketball player with her eldest son Mason, five.

Alongside the photo, Kourtney wrote: ''Believing in the power of prayer for this beautiful soul.''

Kylie's boyfriend, rapper Tyga, also used Instagram to send a message of support for Lamar, who is in a coma in a Las Vegas hospital, reportedly with multiple organ failure.

He wrote: ''Stay strong bro. We all praying for you champ. God Got a plan for you.''

Meanwhile, Lamar's 17-year-old daughter Destiny - his child with former partner Liza Morales - has vowed to ''never let go'' of her father.

She tweeted: ''Please don't leave us

''Soon I'll be by your side and I'll never let go. I love you daddy (sic)''

Alongside another old picture of herself and her father, she wrote: ''Let us laugh again and be filled with happiness (sic)''