Wheatley is a fictional artificial intelligence from the Portal franchise first introduced in the 2011 video game Portal 2. He is voiced by British comedian and writer Stephen Merchant, and created in part by Portal 2's designer Erik Wolpaw. Since his appearance in Portal 2, Wheatley has received overwhelmingly positive reception from critics. Merchant has been praised for his portrayal by critics who cited his fast-talking dialogue. Wheatley has also been described as a contrast to GLaDOS's "slower-speaking and more deliberate" personality.