Question: Who stars as the concierge in the film that opened the 64th Berlin International Film Festival?

Context articles: 64th Berlin International Film Festival
Heiner Carow
Randa Haines
Peter Lilienthal
Stereo (2014 film)
Norbert Kückelmann
The Grand Budapest Hotel
Maurice Dugowson
Manuel Gutiérrez Aragón
Roland Gräf

The 64th annual Berlin International Film Festival was held from 6 to 16 February 2014.
 Wes Anderson's film "The Grand Budapest Hotel" opened the festival.
 British film director Ken Loach was presented with the Honorary Golden Bear.
 The Golden Bear was awarded to the Chinese film "Black Coal, Thin Ice" directed by Diao Yinan, which also served as closing film.
Heiner Carow (19 September 1929 – 1 February 1997) was a German film director and screenwriter.
 His 1986 film "So Many Dreams" was entered into the 37th Berlin International Film Festival.
 The following year, he was a member of the jury at the 38th Berlin International Film Festival.
 In 1990, his film "Coming Out" won the Silver Bear for an outstanding artistic contribution at the 40th Berlin International Film Festival.
Randa Jo Haines (born February 20, 1945 in Los Angeles) is a film and television director and producer.
 Haines started her career as a script supervisor on several low-budget features in the 1970s, including "Let's Scare Jessica to Death" and "The Groove Tube".
 She is perhaps most famous for directing the critically acclaimed feature film "Children of a Lesser God" (1986), which starred William Hurt and Marlee Matlin, for which Matlin won the 1987 Academy Award as Best Actress.
 Haines also won the Silver Bear at the 37th Berlin International Film Festival.
 In 1989 she was a member of the jury at the 39th Berlin International Film Festival.
 In 2002 she was a member of the jury at the 24th Moscow International Film Festival.
Peter Lilienthal (born 27 November 1929) is a German film director, writer, actor and producer.
 His 1979 film "David" won the Golden Bear at the 29th Berlin International Film Festival.
 His 1984 film "Das Autogramm" was entered into the 34th Berlin International Film Festival.
 In 1996, he was a member of the jury at the 46th Berlin International Film Festival.
Stereo is a 2014 German thriller film directed by Maximilian Erlenwein.
 The film premiered in the Panorama section of the 64th Berlin International Film Festival.
 On 5 July 2014 the film was presented at the Vologda Independent Cinema Voices Festival.
 The North American Premiere was celebrated at the Fantasia International Film Festival in Montreal on 31 July 2014.
 "Stereo" opened the South Korean Puchon International Fantastic Film Festival 2014.
 It was also shown in the "Sang Neuf" (Young Blood) Section at the Beaune Film Festival 2014 and in the International Competition Programme of the Odessa International Film Festival.
Norbert Kückelmann, (born 1 May 1930 - died 31 August 2017) was a German film director, screenwriter and lawyer.
 He was born in Munich, During the 1950s he studied law and worked part-time as a film critic.
 After graduation, he worked as a lawyer in Munich and Mainz.
 In 1965 he founded together with Alexander Kluge and Hans-Rolf Strobel the Young German Film Committee (German: "Kuratorium Junger Deutscher Film" .
 Continuing to work as a lawyer he directed his first film "Die Sachverständigen" in 1973.
 At the 23rd Berlin International Film Festival the film won a Silver Bear.
 His first film also won the Deutscher Filmpreis - Best Feature Film.
 At the 34th Berlin International Film Festival, his film "Man Under Suspicion" also won a Silver Bear.
 Two years later, he was a member of the jury at the 36th Berlin International Film Festival.
The Grand Budapest Hotel is a 2014 comedy film written and directed by Wes Anderson, from a story by Anderson and Hugo Guinness, inspired by the writings of Stefan Zweig.
 Featuring an ensemble cast, it stars Ralph Fiennes as a concierge who teams up with one of his employees (Tony Revolori) to prove his innocence after he is framed for murder.
Maurice Dugowson (23 September 1938 – 11 November 1999) was a French film director and screenwriter.
 His 1975 film "Lily, aime-moi" was entered into the 25th Berlin International Film Festival.
 The following year, his film "F comme Fairbanks" was entered into the 26th Berlin International Film Festival.
 In 1981 his film "Bye, See You Monday" was entered into the 12th Moscow International Film Festival.
Manuel Gutiérrez Aragón (Torrelavega, Cantabria 2 January 1940) is a Spanish screenwriter and film director.
 His 1973 film "Habla, mudita" was entered into the 23rd Berlin International Film Festival.
 In 1977, he won the Silver Bear for Best Director for "Camada negra" at the 27th Berlin International Film Festival.
 His 1979 film "El corazón del bosque" was entered into the 29th Berlin International Film Festival.
 Two years later, his film "Maravillas" was entered into the 31st Berlin International Film Festival.
 His 1982 film "Demons in the Garden" was entered into the 13th Moscow International Film Festival where it won the FIPRESCI Prize.
 In 1991 he was a member of the jury at the 17th Moscow International Film Festival.
Roland Gräf (13 October 1934 – 11 May 2017) was a German cinematographer, film director and screenwriter.
 In 1982 his film "Märkische Forschungen" won the Findling Award at the National Feature Film Festival of the GDR in Karl-Marx-Stadt (Nationales Spielfilmfestival der DDR).
 His 1986 film "The House on the River" was entered into the 36th Berlin International Film Festival.
 Three years later, his film "" was entered into the 39th Berlin International Film Festival.
 In 1991, his film "The Tango Player" was entered into the 41st Berlin International Film Festival.