Youth is a 2015 comedy-drama film written and directed by Paolo Sorrentino. It is the director's second English-language film, and stars Michael Caine and Harvey Keitel as best friends who reflect on their lives while holidaying in the Swiss Alps. It is a story of the eternal struggle between age and youth, the past and the future, life and death, commitment and betrayal. The cast also includes Rachel Weisz, Paul Dano, and Jane Fonda.

The film premiered at the 2015 Cannes Film Festival, where it competed for the Palme d'Or and had a positive critical response. At the 28th European Film Awards, Youth won Best Film, Best Director for Sorrentino, and Best Actor for Caine. It received one Academy Award nomination: Best Original Song, for David Lang's composition of "Simple Song #3". At the Golden Globe Awards, Lang was also nominated along with Jane Fonda for Best Supporting Actress.

Septuagenarian best friends Fred Ballinger and Mick Boyle are on vacation in the Swiss Alps, staying at a luxury spa/resort in Wiesen. Fred is a retired composer of classical music; at the hotel, he is approached by an emissary for Queen Elizabeth II, conferring a knighthood and asking him to perform his popular piece "Simple Song #3" at Prince Philip's birthday concert. Fred turns down the offer, claiming he is not interested in performing any more – although he still composes pieces in his head when alone. Mick is a film director, and is working with a group of writers to develop the screenplay for his latest film, which he calls his "testament". Also with them is actor Jimmy Tree, who is researching for an upcoming role and frustrated that he is only remembered for his role as a robot. The hotel is inhabited by other quirky individuals, including a young masseuse, an overweight Diego Maradona, and Miss Universe.

Fred and Mick reflect on their lives, admitting that their memories are fading and that they see little in their futures. Fred's daughter and assistant, Lena, is married to Mick's son, but the latter leaves her for pop star Paloma Faith. Lena stays at the resort and vents her anger at her father, who was always distant as she grew up. The emissary returns, and Lena cries as Fred explains that he won't perform "Simple Song #3" because the soprano part belongs only to his wife and she can no longer sing.

Mick completes his screenplay and is satisfied with it. The main role is written for aging diva Brenda Morel, who has starred in eleven of his previous films. Brenda surprises Mick by arriving at the resort, and telling him that she is taking a television role instead; cinema is the past, she says, and Mick hasn't made a good film in years. Disheartened, Mick commits suicide by jumping off a balcony in front of Fred. Fred decides to visit his wife for the first time in years. She is senile, and living at a care home in Venice. He then returns to the UK to conduct "Simple Song #3" in front of the Queen and Prince.

Interspersed throughout the film are surreal sequences, including a levitating monk, an imagined Paloma Faith music video, Jimmy dressed as Adolf Hitler, Fred conducting a field of cowbells, and Mick envisioning all his previous leading ladies on a mountaintop (including Brenda, in her new unglamorous TV role).

Youth is Sorrentino's second English-language film and the follow-up to his Academy Award-winning film The Great Beauty (2013).^[5] Principal photography began in Flims, Switzerland in May 2014.^[5][6] The primary location was the Waldhaus Flims, a 5-star hotel built in the nineteenth century, where the cast and crew all stayed while filming.^[7] Other scenes were filmed in Davos, Switzerland, particularly in the Hotel Schatzalp (the location of Thomas Mann's The Magic Mountain). Some filming was also done in Rome^[8] and Venice.

Sorrentino's regular cinematographer Luca Bigazzi returned to photograph the film.^[9] David Lang contributed in composing the film's music, including the piece "Simple Song #3" that is fictionally performed for Queen Elizabeth at the end. The scene was shot with soprano Sumi Jo, violinist Viktoria Mullova, the BBC Concert Orchestra, and the Berlin Radio Choir.^[10][11]

Michael Caine was coached for the role as conductor by the Italian composer and conductor Dimitri Scarlato.^[12]

Youth premiered at the 2015 Cannes Film Festival, where it competed for the Palme d'Or,^[13][14] and was simultaneously released in Italy. The film was also selected for the Special Presentations section of the 2015 Toronto International Film Festival.^[15]Fox Searchlight^[16] distributed the film in the United States on 4 December 2015 in a limited release.^[17] It was released in the United Kingdom on 29 January 2016, by StudioCanal.^[18] By the end of its box office run, Youth had earned $24,035,045 worldwide.^[4]