Josh Groban is 43 years and 7 month(s) old. He was born in 27 Feb, 1981. Joshua Winslow Groban or famously known as Josh Groban is a thirty-three year old American singer and actor who rose to fame when his singles topped the US charts in 2007 and was the best selling artist of the nation as well. He has been in quite a few high-profile relationships and last dated Michelle Trachtenberg in 2012 after which nothing has been reported about his personal life.