Mario Rosenstock is an Irish actor, comedian, impressionist and musician. Rosenstock first came to the attention of the Irish public playing the role of Dr. David Hanlon in the soap Glenroe in the 1990s. However, he is now best known for the popular Gift Grub segments which have featured on the Ian Dempsey Breakfast Show on Today FM since May 1999.
Rosenstock performed an impersonation of José Mourinho in a parody of a song from the musical Joseph and the Amazing Technicolor Dreamcoat. This spread like wildfire on Internet message boards and eventually it was played on a Sky Sports broadcast. Mourinho had heard the song and enjoyed the impersonation so much he asked Rosenstock to perform a private show for him and the Chelsea squad.Rosenstock later released, with Mourinho’s blessing, a single version of “José and his Amazing Technicolor Overcoat”. He also released another song (“I Sign a Little Player or Two”) on the internet with a parody of Mourinho in an interview then breaking into song.
In 2005, he starred as Keano in the comedy musical play I, Keano, which concerns Keane storming out of the Republic of Ireland national football squad during preparations for the 2002 FIFA World Cup.
In 2005, Rosenstock achieved the Christmas number one single in the Irish music Charts, with a parody of Will Young’s song Leave Right Now (which itself was a Christmas number-one in 2003). The parody concerned Roy Keane’s controversial departure from Manchester United and his falling-out with Alex Ferguson.
In November 2012 his new show called The Mario Rosenstock Show started on RTÉ2.