Providing the vocal effects for both Tom Cat and Jerry Mouse in Tom and Jerry this time around is primarily the prolific Frank Welker with archival recordings from William Hanna, Mel Blanc, and June Foray being used throughout the latest version of the classic cartoon.
Welker, a longtime voice-actor for Hanna-Barbera, has gone on to voice characters like Jabberjaw, Crime Globe in The Super Globetrotters, and pretty much any given cartoon.
He also provided vocal effects for Tommy Boy (the deer), Mars Attacks!