Question: Who is the co-star of the current co-president of the Actors Studio in the movie Youth?
Context: Harvey Keitel ( ; born May 13, 1939) is an American actor and producer.  An Oscar and Golden Globe Award nominee, he has appeared in films such as Theo Angelopoulos' "Ulysses' Gaze", Martin Scorsese's "Mean Streets", "Taxi Driver" and "The Last Temptation of Christ"; Ridley Scott's "The Duellists" and "Thelma & Louise"; Peter Yates' "Mother, Jugs & Speed"; Quentin Tarantino's "Reservoir Dogs" and "Pulp Fiction"; Jane Campion's "The Piano"; Abel Ferrara's "Bad Lieutenant"; Robert Rodriguez's "From Dusk till Dawn"; James Mangold's "Cop Land"; Wes Anderson's "Moonrise Kingdom" and "The Grand Budapest Hotel"; and Paolo Sorrentino's "Youth".  Along with actors Al Pacino and Ellen Burstyn, he is the current co-president of the Actors Studio. James Lipton (born September 19, 1926) is an American writer, lyricist, actor and dean emeritus of the Actors Studio Drama School at Pace University in New York City.  He is the executive producer, writer and host of the Bravo cable television series "Inside the Actors Studio", which debuted in 1994. The Actors Studio Drama School at Pace University is a three-year graduate program in the theater arts.  It has been located at Pace University since 2006 and grants Master of Fine Arts degrees in acting, directing, and playwriting.  James Lipton serves as Dean Emeritus.  The program is sanctioned by the Actors Studio, though graduation from the school does not guarantee membership in the Actors Studio. Women in Animation (WIA) is a non-profit organization with the purpose of furthering, promoting, and supporting female animators in the art, science and business of animation.  WIA has chapters in Los Angeles, San Francisco, New York City, Dublin, Pune, and Toronto.  WIA feels that the lack of women in the animation profession is because "there has been very little work to intentionally change the status quo."  In order to help women enter the animation profession, WIA has created a mentorship program, a voice over group, a scholarship, talks, and events.  Marge Dean is the current co-president of WIA along with Kristy Scanlan. Carolina Actors Studio Theatre (CAST) was an independent non-profit theatre company located at 2424 North Davidson Street in Charlotte, North Carolina.  It was founded in 1992 by Charlotte acting instructor Ed Gilweit as an actor's teaching school.  In 2000 Gilweit's company partnered with a video and stage production company run by Michael Simmons called Victory Pictures, Inc., and then with the fledgling theatre group Another Roadside Performance Company run by Robert Lee Simmons, Michael Simmons's son.  Through this series of mergers, Gilweit and the Simmonses became the founders of the Carolina Actors Studio Theatre.  After Gilweit's death in 2002, Michael Simmons became the Managing Artistic Director. Vivian Nathan (October 26, 1916 – April 3, 2015) was an American actress and original, founding, member of the Actors Studio, which opened in 1947.  She served on the Actors Studio's board of directors until 1999.  She appeared in the original Broadway debut productions of "The Rose Tattoo" (1951) and "Camino Real" (1953).  Her film credits included "Klute". Annie Laurie Gaylor (born November 2, 1955) is a co-founder of – and, with her husband Dan Barker, a current co-president of – the Freedom From Religion Foundation.  She was also the editor of the organization's newspaper, "Freethought Today" (published ten times per year) until 2015.  Gaylor is the author of several books, including "Woe to the Women: The Bible Tells Me So", "Betrayal of Trust: Clergy Abuse of Children" and, as editor, "Women Without Superstition: No GodsNo Masters".  She graduated from the University of Wisconsin–Madison's School of Journalism in 1980. Youth is a 2015 Italian 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. Nicole Jaffe David (born May 23, 1941) is a Canadian talent agent and former actress and voice actress, best known as the original voice actress for Velma Dinkley in Hanna-Barbera's "Scooby-Doo" Saturday morning cartoon series from 1969 to 1973.  A life member of The Actors Studio, David - under her maiden name Nicole Jaffe - had previously appeared in "The Trouble with Girls" with Elvis Presley (and future "Scooby-Doo" co-star Frank Welker) and in Disney's "The Love Bug". Lee Strasberg (born Israel Strasberg; November 17, 1901February 17, 1982) was a Polish-born American actor, director, and theatre practitioner.  He was born in a part of Galicia, Austrian Poland, in what is now Ukraine.  He co founded, with directors Harold Clurman and Cheryl Crawford, the Group Theatre in 1931, which was hailed as "America's first true theatrical collective".  In 1951, he became director of the nonprofit Actors Studio in New York City, considered "the nation's most prestigious acting school", and in 1966, was involved in the creation of Actors Studio West in Los Angeles.
Answer: Michael Caine