When actor Michael Clarke Duncan went into cardiac arrest Friday, one of the first to express his support was Shane Carwin.

Carwin, a heavyweight fighter in the UFC and former interim heavyweight champion who will be a coach on the next season of FX reality show The Ultimate Fighter, took to his Twitter account (@ShaneCarwin) on Friday to tweet, "MMA fan Michael Clarke Duncan just went into cardiac arrest. Please send some positive thoughts to him and his family."

Messages of support also came from the account of MMA apparel brand Six Deuce Clothing (@sixdeuce) and MMA website Studio MMA (@studiomma).

According to TMZ, Duncan went into cardiac arrest just after 2 a.m. on Friday, and girlfriend Omarosa Stallworth performed CPR in order to resucitate him. He is now in stable condition.

54-year-old Duncan, who earned an Oscar nomination in 2000 for his breakout role as John Coffey in The Green Mile, is an avid MMA fan and a regular in the celebrity section at UFC events. He was in attendance last November at the Honda Center in Anaheim when Junior dos Santos defeated Cain Velasquez to win the UFC's heavyweight title. On Saturday night, though, he watched from home when Anderson Silva defended his UFC Middleweight Championship against Chael Sonnen at UFC 148.

"The best way to watch UFC!" Duncan posted to his Twitter account (@OfficialMCD). "From home."

Duncan most recently starred in the Fox drama The Finder, which was cancelled in May. He also provided the voice of Kilowog in last year's Green Lantern. 

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