How the trend of "youthification" is conquering Hollywood, from Ang Lee de-aging Will Smith in Gemini Man to Martin Scorsese getting out the magic paintbrush to make Joe Pesci, Al Pacino and Robert De Niro several decades younger in The Irishman. Inside Cinema explores how the age of the actor has been tweaked over the years, from hiring a younger lookalike for flashbacks - Moneyball, for example - to using the performer's son (Ice Cube's son O'Shea Jackson Jr. in Straight Outta Compton) to the more recent Marvel CGI chicanery in Iron Man 3, with Robert Downey Jr, and Guardians Of The Galaxy 2, with Kurt Russell.