John Peter Wearing (born c. 1945) is an Anglo-American theatre historian and professor, who has written numerous books and articles about nineteenth and twentieth-century drama and theatre, including The Shakespeare Diaries: A Fictional Autobiography, published in 2007. He has also written and edited well-received books on George Bernard Shaw, Arthur Wing Pinero, extensive reference series on the London theatre from 1890 to 1980, and theatrical biographies, among other subjects. As a professor of English literature, Wearing has specialised in Shakespeare and modern drama.