Who allowed John Wilkes Booth to enter president Lincoln's theater box?

John Wilkes Booth was allowed to enter President Lincoln's theater box by the doorkeeper, who was likely distracted and unaware of Booth's intentions. Booth was a well-known actor and had connections in the theater, which facilitated his access. He entered the box during a performance of "Our American Cousin" on April 14, 1865, ultimately assassinating Lincoln.