He finished his rookie season with 39 receptions for 459 yards and six touchdowns.and was named the Pittsburgh Steelers' rookie of the year. The Steelers finished second in the AFC North with an 11–5 record. On January 8, 2006, he appeared in his first career postseason game and caught two passes for 15-yards in a 31–17 AFC Wildcard victory over the Cincinnati Bengals. The following game, Miller caught three passes for 61 yards and one touchdown in the Steelers' 21–18 upset over the top-seeded Indianapolis Colts in the divisional playoff round. After defeating the Denver Broncos, the Steelers went on to play in Super Bowl XL. On February 5, 2006, they defeated the Seattle Seahawks, 21–10, and Miller earned his first Super Bowl ring. He was held without a catch during the game.