Answer by taking a quote from the following article:

Christopher D'Olier Reeve (September 25, 1952 - October 10, 2004) was an American actor. He achieved stardom for his acting achievements. In particular, he is best known for his motion picture portrayal of the classic DC comic book superhero Superman, beginning with the acclaimed Superman (1978), for which he won a BAFTA Award. Reeve appeared in other critically acclaimed films such as The Bostonians (1984), Street Smart (1987) and The Remains of the Day (1993).

After graduating from Princeton Day School in June 1970, Reeve acted in plays in Boothbay, Maine and planned to go to New York City to find a career in theater. Instead, at the advice of his mother, he applied for college. He was accepted into Brown, Carnegie Mellon, Columbia, Cornell, Northwestern, and Princeton. Reeve claimed that he chose Cornell primarily because it is a three-and-a-half-hour drive from New York City, where he planned to start his career as an actor, despite the fact that Princeton and Columbia are considerably closer to the city than Cornell, with Columbia being in New York City, just a few miles uptown from the theater district.  Reeve joined the theater department in Cornell and played Pozzo in Waiting for Godot, Segismundo in Life Is a Dream, Hamlet in Rosencrantz and Guildenstern Are Dead, and Polixenes in The Winter's Tale. Late in his freshman year, Reeve received a letter from Stark Hesseltine, a high-powered agent who had discovered Robert Redford and represented actors such as Richard Chamberlain, Michael Douglas, and Susan Sarandon. Hesseltine had seen Reeve in A Month in the Country and wanted to represent him. The two met and decided that instead of dropping out of school, Reeve could come to New York once a month to meet casting agents and producers to find work for the summer vacation. That summer, he toured in a production of Forty Carats with Eleanor Parker.  The next year, Reeve received a full-season contract with the San Diego Shakespeare Festival, with roles as Edward IV in Richard III, Fenton in The Merry Wives of Windsor, and Dumaine in Love's Labour's Lost at the Old Globe Theatre.  Before his third year of college, Reeve took a three-month leave of absence. He flew to Glasgow and saw theatrical productions throughout the United Kingdom. He was inspired by the actors and often had conversations with them in bars after the performances. He helped actors at the Old Vic with their American accents by reading the newspaper aloud for them. He then flew to Paris, where he spoke fluent French for his entire stay; he had studied it from third grade until his second year in Cornell. He watched many performances and immersed himself in the culture before finally returning to New York to reunite with his girlfriend.

When did he go to cornell?
After graduating from Princeton Day School in June 1970,