Ashton Kutcher, other celebs Tweet reactions to Steve Jobs' death

Slideshow posted in Photos | Wednesday, October 05, 2011

20 of 30: "Rare in a lifetime.. To witness a single man revolutionize technology and the way we carry on with life as we know it... RIP Steve Jobs," Wilmer Valderrama wrote on Twitter, referring to the death of Apple co-founder Steve Jobs on October 5. The 56-year old computer entrepreneur and inventor had battled cancer in 2004 and underwent a liver transplant in 2009 after taking a leave of absence for unspecified health problems. (Pictured: Wilmer Valderrama appears in a still from 'That 70s Show.') ( Photo / Fox Network)