Question: Who was the star of Horizon Pictures first production?

Context paragraphs:
Roger Corman's Cult Classics: Roger Corman's Cult Classics is a collection of DVD and Blu-ray discs of films produced by Roger Corman.  It began as a collaboration in 2010 between Roger Corman's New Horizon Pictures and Shout!  Factory in 2010.  The project ended in 2012.

Cross Creek Pictures: Cross Creek Pictures is an American film production studio formed in 2009.  Their first production was the acclaimed "Black Swan" (2010), which was followed by "The Ides of March" (2011), "The Woman in Black" (2012) and "Rush" (2013).  And also, CCP co-produced a few films with Exclusive Media.  In September 2011, Cross Creek Pictures signed a deal with Universal Pictures, where the studio would release at least six of Cross Creek's productions over the following 3 years.  In late 2015, Cross Creek signed a new three-year, multifaceted co-financing, production, and distribution deal with Sony Pictures Entertainment.

Melba (film): Melba is a 1953 musical biopic drama film of the life of Australian-born soprano Nellie Melba, written by Harry Kurnitz and directed by Lewis Milestone for Horizon Pictures, marking the film debut of the Metropolitan Opera's Patrice Munsel.

The African Queen (film): The African Queen is a 1951 British-American adventure film adapted from the 1935 novel of the same name by C. S. Forester.  The film was directed by John Huston and produced by Sam Spiegel and John Woolf.  The screenplay was adapted by James Agee, John Huston, John Collier and Peter Viertel.  It was photographed in Technicolor by Jack Cardiff and had a music score by Allan Gray.  The film stars Humphrey Bogart (who won the Academy Award for Best Actor – his only Oscar), and Katharine Hepburn with Robert Morley, Peter Bull, Walter Gotell, Richard Marner and Theodore Bikel.

Horizon Pictures: Horizon Pictures (GB) Ltd was a film production company founded in the United Kingdom by the Austrian-born American film producer Sam Spiegel.  The company's first production was the Academy Award-winning "The African Queen", starring Humphrey Bogart and Katharine Hepburn, in 1951.

Abhishek Pictures: Abhishek Pictures first distribution was the 2010 film "Yamudu", which was on the budget of 150 million240 million to produce.  The company has also distributed films such as "Brahmotsavam", "Rudhramadevi", and "Srimanthudu".  It has also distributed Bollywood films, such as "Atithi Tum Kab Jaoge? " and "Ekk Deewana Tha", and a number of Hollywood films, including "10,000 BC", "2012", and "Men in Black 3".

ITV Play of the Week: ITV Play of the Week is a 90-minute UK television anthology series produced by a variety of companies including Granada Television, Associated-Rediffusion, ATV and Anglia Television.  From 1956 to 1966 approximately 500 episodes aired on ITV.  The first production was "Ten Minute Alibi", produced by Associated-Rediffusion on 14 May 1956 and the earliest to survive is "There Was a Young Lady", transmitted on 23 July 1956.  The first production not to be transmitted live was Henrik Ibsen's "The Wild Duck" which was recorded on film.  The first to be pre-recorded on videotape was "Mary Broome", a Granada production broadcast on 3 September 1958.  Subsequently, only one play was transmitted live, Associated-Rediffusion's "Search Party" on 26 July 1960.  The master tape of "The Liberty Man", a Granada production broadcast on 1 October 1958, contains the original advertisements during the first commercial break.  "The Violent Years" was networked from Anglia on its opening night, 27 October 1959, and exists at the University of East Anglia.

Christmas Grace: Christmas Grace is an Christmas-related film about two competing toy stores.  It was produced by Bright Horizon Pictures and Crystal Creek Media, the latter of which created films such as "Creed of Gold" and "Courageous Love".  Filming of "Christmas Grace" took place around several locations in Southeastern Michigan in early 2012.  The film was released on October 7, 2014.

Lawrence of Arabia (film): Lawrence of Arabia is a 1962 epic historical drama film based on the life of T. E. Lawrence.  It was directed by David Lean and produced by Sam Spiegel through his British company Horizon Pictures, with the screenplay by Robert Bolt and Michael Wilson.  The film stars Peter O'Toole in the title role.  It is widely considered one of the greatest and most influential films in the history of cinema.  The dramatic score by Maurice Jarre and the Super Panavision 70 cinematography by Freddie Young are also highly acclaimed.

Jacob's Hammer: Jacob's Hammer is a British horror Film starring Helen Holman and George McCluskey.  The film was directed and written by Angie Bojtler.  This is Arkady Pictures first film.  It has a limited theatrical release across the UK October 2012.

Supporting paragraphs: Horizon Pictures The African Queen (film)
Answer: Humphrey Bogart