Mortimer Brewster 's uncle claims to be President Teddy Roosevelt in the film Arsenic and Old Lace .
In 1944 , Grant starred alongside Priscilla Lane , Raymond Massey and Peter Lorre , in Frank Capra 's dark comedy Arsenic and Old Lace , playing the manic Mortimer Brewster , who belongs to a bizarre family which includes two murderous aunts and a brother claiming to be President Teddy Roosevelt .
Cary Grant