Hanks was in Austin on Saturday and spoke to hundreds of listeners about his new book, "Uncommon Type: Some Stories."
Hanks at one point told the crowd that he was bored of taking their questions and wanted to ask one himself.
Hanks then pulled out a piece of paper and said that a man in the crowd, Ryan McFarling, had a question for a woman named Nikki Young. Hanks said the question was: "Nikki, will you marry me?"
The couple went on stage, McFarling got down on one knee, and gave Young a ring.
Hanks then hugged the newly-engaged woman and offered his best wishes to the couple.
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