Tom Dillon (1895-1962) Ralph Dunn, Laura, 1944.     Paramount changed directors from Rouben Mamoulian to Otto Preminger.  Ditto for the role of Fred Callahan - from Dillon to Dunn. Copyright © 2023 Crawley's Casting Calls. All Rights Reserved. Joomla! is Free Software released under the GNU General Public License.