Title: Titanic (1997 film)
Content:  Titanic began its awards sweep starting with the Golden Globes, winning four: Best Motion Picture – Drama, Best Director, Best Original Score, and Best Original Song. Kate Winslet and Gloria Stuart were also nominees. The film garnered fourteen Academy Award nominations, tying the record set in 1950 by Joseph L. Mankiewicz's All About Eve and won eleven: Best Picture (the second film about the Titanic to win that award, after 1933's Cavalcade), Best Director, Best Art Direction, Best Cinematography, Best Visual Effects, Best Film Editing, Best Costume Design, Best Sound (Gary Rydstrom, Tom Johnson, Gary Summers, Mark Ulano), Best Sound Effects Editing, Best Original Dramatic Score, Best Original Song. Kate Winslet, Gloria Stuart and the make-up artists were the three nominees that did not win. James Cameron's 
Title: James Cameron
Content:  Titanic received a record-tie of fourteen nominations (tied with All About Eve (1950)) at the 1998 Academy Awards. It won 11 of the awards, tying the record for most wins with 1959's Ben-Hur, and 2003's The Lord of the Rings: The Return of the King, including: Best Picture, Best Director, Best Art Direction, Best Cinematography, Best Visual Effects, Best Film Editing, Best Costume Design, Best Sound Mixing, Best Sound Editing, Best Original Score, and Best Original Song. Upon receiving Best Picture, Cameron and producer Jon Landau, asked for a moment of silence to remember the 1,500 people who died when the ship sank. Film critic 
Title: List of accolades received by Titanic
Content:  being "culturally, historically, or aesthetically significant". At the 55th Golden Globe Awards, Titanic won in the categories of Best Motion Picture – Drama, Best Director, Best Original Score, and Best Original Song. DiCaprio, Winslet and Gloria Stuart were also nominated for their acting performances. At the 70th Academy Awards, the film garnered fourteen nominations, tying the record set in 1950 by Joseph L. Mankiewicz's All About Eve, with eleven wins: Best Picture (the second film about the Titanic to win that award, after 1933's Cavalcade), Best Director, Best Art Direction, Best Cinematography, Best Visual Effects, Best Film Editing, Best Costume Design, Best Sound, Best Sound Editing, Best Original Dramatic Score, and Best Original Song. Winslet, Stuart 
Title: Titanic (1953 film)
Content:  The film won the Academy Award for Best Original Screenplay, and was nominated for the Best Art Direction. The film was also nominated for the Directors Guild of America Award.
Title: Jupiter Award (film award)
Content: Best International Film: Titanic, directed by James Cameron ; Best International Director: James Cameron, for Titanic ; Best International Actor: Jack Nicholson, for As Good as It Gets ; Best International Actress: Kate Winslet, for Titanic 
Title: List of accolades received by Titanic
Content:  Titanic is a 1997 American epic romance and disaster film directed, written, co-produced, and co-edited by James Cameron. Incorporating both historical and fictionalized aspects, it is based on accounts of the sinking of the RMS Titanic, and stars Leonardo DiCaprio and Kate Winslet as members of different social classes who fall in love aboard the ship during its ill-fated maiden voyage. Titanic grossed a worldwide total of over $2.2 billion on a production budget of $200 million, being the first and second film to reach the mark of one and two billion dollars, respectively. It became the highest-grossing film of all time in 1998, and remained so for twelve years, until Avatar (2009), also written and directed 
Title: 76th Academy Awards
Content:  single film in Oscar history. The film was also the tenth film to win Best Picture without any acting nominations. Best Director nominee Sofia Coppola became the first American woman and third woman overall to be nominated in that category. By virtue of her father, Francis Ford Coppola and her grandfather, Carmine's previous wins, her victory in the Original Screenplay category made her the second third-generation Oscar winner in history. At age thirteen, Best Actress nominee Keisha Castle-Hughes became the youngest nominee in that category until being surpassed by Quvenzhané Wallis, who was nine at the time of her nomination, in 2013. With Sean Penn and Tim Robbins's respective wins in the Best Actor and Best Supporting Actor categories, Mystic River became the fourth film to win both male acting awards.
Title: List of accolades received by Titanic
Content:  the make-up artists were the three nominees that did not win. It was the second film to win eleven Academy Awards, after Ben-Hur (1959). It was also nominated for ten British Academy Film Awards, including Best Film and Best Director; it failed to win any. The film garnered a leading twelve nominations at the 2nd Golden Satellite Awards and more three in the 2005 edition, winning a total of eight awards, while Stuart won the Saturn Award for Best Supporting Actress. Other recognitions came from numerous North American guilds, such as the American Society of Cinematographers, Art Directors Guild, Directors Guild of America, National Board of Review, Producers Guild of America, and the Screen Actors Guild. 
Title: 70th Academy Awards
Content:  Picture without a screenwriting nomination since 1965's The Sound of Music. Jack Nicholson became the fourth performer to win at least three acting Oscars. Both Nicholson and Helen Hunt won for their roles in As Good as It Gets, making it the seventh film to win both lead acting awards. Nominated for their performances as Rose DeWitt Bukater in Titanic, Best Actress nominee Kate Winslet and Best Supporting Actress nominee Gloria Stuart became the first pair of actresses nominated for portraying the same character in the same film. At age 87, Stuart also became the oldest performer nominated for a competitive Oscar.
Title: Titanic (1997 film)
Content:  screenplay and Leonardo DiCaprio were not nominees. It was the second film to receive eleven Academy Awards, after Ben-Hur. The Lord of the Rings: The Return of the King would also match this record in 2004. Titanic won the 1997 Academy Award for Best Original Song, as well as four Grammy Awards for Record of the Year, Song of the Year, Best Song Written Specifically for a Motion Picture or Television, and Best Female Pop Vocal Performance. The film's soundtrack became the best-selling primarily orchestral soundtrack of all time, and became a worldwide success, spending sixteen weeks at number-one in the United States, and was certified diamond for over eleven million copies sold in the United States alone. The soundtrack also became the best-selling album of 1998 

Question: who won the oscar for best actor when titanic was nominated?
Answer: Jack Nicholson.