Doug Walker was born in Naples, Italy; and because his father was in the Navy, lived in many different places across the United States when he was growing up. He went on to study film at Northern Illinois University, majoring in communications.

After college, he worked as an illustrator and started making YouTube videos for fun. He first grabbed viewers' attention with clever 5 second movie versions of popular films, and gained more notoriety with his snarky "Nostalgia Critic" reviews.

In 2008, "Nostalgia Critic" moved from YouTube to the independent site That Guy With the Glasses and Channel Awesome. By 2009, an increased income from advertising on the new site allowed Walker to quit his day job (a video that he made to commemorate the occasion also went viral) and develop his web persona full-time.