Instagram/Emily Osment & Miley Cyru TV Hannah Montana's 20th anniversary special missed a key cast member. Emily Osment explains her absence and shares a heartfelt tribute to the iconic Disney show. April 14, 2026 AceShowbiz - Hannah Montana marked its 20th anniversary with a special celebration on Disney+, but not all original cast members were present. Among the notable absences was Emily Osment, who portrayed Miley Stewart's best friend on the hit Disney Channel series. Emily Osment did not attend the anniversary special's premiere, prompting her to address her absence on social media.