"All of us here stand in solidarity and support of France and the French people," she said. "Our connection with the film-loving French is especially deep."
Lee offered "peace and love to people in France" as he received his award. Denzel Washington, Wesley Snipes and Samuel L. Jackson brought the filmmaker onstage for his Oscar.
"Spike Lee has put more African-Americans to work in this business than anyone else in this business," Washington said in his introduction.
Cate Blanchett and Laura Linney each paid tribute to Rowlands, calling her a trailblazer and inspiration. The 85-year-old actress, whose career spans six decades, received her Oscar from her son, Nick Cassavetes, who directed his mother in 2004's The Notebook. He noted that the award was "the first Oscar in the family".
Looking lovingly at the golden trophy, Rowlands thanked the academy governors for "introducing me to this fine fellow."
"He's very handsome," she said. "You know, he's just so elegant... I think I'll take him home."
Reynolds received the Jean Hersholt Humanitarian Award. Jane Fonda and Meryl Streep introduced the 83-year-old entertainer, who announced on Friday that she would be unable to attend the ceremony.
Reynolds was recognised for her decades-long commitment to various charities, including the mental health organisation she founded, the Thalians. Her granddaughter accepted Reynolds' statuette.
A live band played throughout the evening, and there were two musical interludes: Zooey Deschanel performed the Oscar-nominated song Reynolds sang in 1958's Tammy and the Bachelor." Aloe Blacc sang A Change is Gonna Come as part of Lee's introduction.
Other famous faces at the starry dinner included Johnny Depp and wife Amber Heard, Daniel Craig and wife Rachel Weisz, Will Smith, Ice Cube, Mark Ruffalo, Quentin Tarantino, Saoirse Ronan and Michael Caine. Portions of the untelevised ceremony may be included in the 2016 Academy Awards telecast.
- AP