Who played frederick in the sound of music?
No context provided
Who played Friedrich in the 1965 film The Sound of Music?
Nicholas Hammond
No context provided
Who played Friedrich in The Sound of Music Live!?
Michael Nigro
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Who played Frederick in the 2015 television special?
Guy Trundle
The Sound of Music Live (2015)
https://en.wikipedia.org/wiki/The%20Sound%20of%20Music%20Live%20%282015%29
The Sound of Music Live!
https://en.wikipedia.org/wiki/The%20Sound%20of%20Music%20Live%21
The Sound of Music
https://en.wikipedia.org/wiki/The%20Sound%20of%20Music
The Sound of Music (film)
https://en.wikipedia.org/wiki/The%20Sound%20of%20Music%20%28film%29
 The film is an adaptation of the 1959 stage musical of the same name, composed by Richard Rodgers with lyrics by Oscar Hammerstein II.
The Sound of Music (film)
performed and televised live from 3 Mills Studios in London.
The Sound of Music Live (2015)
The Sound of Music Live is a television special that was originally broadcast by ITV on 20 December 2015. The special was an adaptation of Rodgers and Hammerstein's 1959 Broadway musical
The Sound of Music Live (2015)
The Sound of Music Live! is a television special that was originally broadcast by NBC on December 5, 2013. Produced by Craig Zadan and Neil Meron, the special was an adaptation of Rodgers and Hammerstein's 1959 Broadway musical The Sound of Music. 
The Sound of Music Live!
and was performed and televised live from Grumman Studios in Bethpage, New York.
The Sound of Music Live!
Nicholas Hammond played Friedrich in the 1965 film The Sound of Music. The film is an adaptation of the 1959 stage musical of the same name that was composed by Richard Rodgers with lyrics by Oscar Hammerstein II. In another adaptation of the musical, Michael Nigro played Friedrich in The Sound of Music Live!, a television special that was originally broadcast by NBC on December 5, 2013. This special was performed and televised live from Grumman Studios in Bethpage, New York. The Sound of Music Live from 2015 is a television special that was performed and televised live from 3 Mills Studios in London and originally broadcast by ITV. This special featured Guy Trundle as Friedrich and was also an adaptation of the 1959 Broadway musical.