Question: Who plays buck on the tv show 9-1-1?
Answer: Oliver Stark
Disambiguated questions and answers: question: Who plays Evan "Buck" Buckley on the tv show 9-1-1?
Who plays Madeline "Maddie" Buckley Kendall on the tv show 9-1-1?
answer: Oliver Stark
Jennifer Love Hewitt
Natural Questions answer: Oliver Stark (from the Wikipedia article "9-1-1 (TV series)")