Jan Ravnik, Taylor Swift. Getty Images(2) Jan Ravnik captured the hearts of Swifties when he stepped on stage with Taylor Swift for her Eras Tour - and now, he'll be on our TV screens on Dancing With the Stars. Ravnik was one of 16 dancers to take the stage with Swift that first night in Glendale, Arizona, and the performer took to social media to share his appreciation for the pop star - and the opportunity.