Potential face claims for Peter Pettigrew:

NAME: Timothy Spall
DATE OF BIRTH: 27 February 1957
NATIONALITY: British
EYE COLOUR: brown
HAIR COLOUR: blonde/greying

NAME: Jeremy Allen White
DATE OF BIRTH: 18 February 1991
NATIONALITY: American
EYE COLOUR: blue
HAIR COLOUR: light brown

NAME: Jamie Bell
DATE OF BIRTH: 14 March 1986
NATIONALITY: British
EYE COLOUR: blue
HAIR COLOUR: dark blonde

NAME: Jeremy Dozier
DATE OF BIRTH: 5 June 1986
NATIONALITY: American
EYE COLOUR: blue
HAIR COLOUR: dark blonde

NAME: Julian Dennison
DATE OF BIRTH: 26 October 2002
NATIONALITY: New-Zealander
EYE COLOUR: brown
HAIR COLOUR: dark brown

NAME: Kyle Gallner
DATE OF BIRTH: 22 October 1986
NATIONALITY: American
EYE COLOUR: blue
HAIR COLOUR: blonde

NAME: Dane Dehaan
DATE OF BIRTH: 6th of February 1986
NATIONALITY: American
EYE COLOUR: blue
HAIR COLOUR: blonde

NAME: Sean Astin
DATE OF BIRTH: 25 February 1971
NATIONALITY: American
EYE COLOUR: blue
HAIR COLOUR: brown/dark blonde

NAME: Jeff Cohen
DATE OF BIRTH: 25 June 1974
NATIONALITY: American
EYE COLOUR: brown
HAIR COLOUR: light brown/bold

NAME: James Buckley
DATE OF BIRTH: 14 August 1987
NATIONALITY: British
EYE COLOUR: hazel
HAIR COLOUR: dark blonde/brown

NAME: Harry Ford
DATE OF BIRTH: 22 December 1987
NATIONALITY: American
EYE COLOUR: blue
HAIR COLOUR: dark blonde

(suggested by twentysevenmiles and kencbi)