This summer's kids' movies are full of weird animal characters, from Turbo the snail to Azrael in The Smurfs II. But Hollywood would have to try a lot harder to match the weirdness of its classic funny-animal films. Here are the weirdest animal movie stars in history.

Francis, the talking mule (voiced by Chill Wills) from the Francis series between 1950 and 1956

(via Posterdb and Crasstalk)

Rin Tin Tin, the German Shepherd dog rescued from a WWI battlefield by an American soldier. He appeared in 27 films in the silent and the talkie era between 1922 and 1931

(via Nitrateville and Rin Tin Tin)

Jiggs, the Cheeta (but known as Cheetah and Chita, too) starred in the first Tarzan movies in the 1930s, but he also appeared in Dirty Work (1933) with Laurel and Hardy and Her Jungle Love (1938) with Dorothy Lamour.

A fun fact: no chimpanzees appear in the original Tarzan novels.

(via iorr and Classic Cinema Images)

Skippy (later renamed to Asta), the Wire Fox Terrier from iconic 1930s movies like The Thin Man (1934), After the Thin Man (1936) and The Awful Truth (1937).

(via Doctor Macro)

Terry, the Cairn Terrier from The Wizard of Oz (1939)

The little dog was paid $125 per week, which was more than the salary of the most famous Munchkins, the Singer Midgets. After the success of the movie he was renamed to Toto.

(via fanpop)

Trigger (originally named Golden Cloud), the smartest horse in the movies, played in dozens of Westerns with Roy Rogers, Son of Paleface (1952), South of Caliente (1951), North of the Great Divide (1950), Hollywood Canteen (1944) and Brazil (1944), among others.

(via Crum on Show Biz and A Drifting Cowboy)

Pal, the original Lassie (1943-1958), appeared in seven MGM Lassie films

(via Doctor Macro)

This lovely chimp from Monkey Business (1952)

(via Cockeyed Caravan and Ffffound)

Bamboo Harvester, the "talking" palomino horse from the TV sitcom Mister Ed (1961-1966)

He was voiced by the cowboy B-movie star Allan Lane.

(via Vanity Fair and Bathroom Reader)

Buttons from the American TV sitcom Me and the Chimp which aired for only one season in 1972 on CBS

(via Sitcoms Online)

Bart the Bear, an Alaskan Kodiak Bear, the star of Windwalker (1981), The Bear (1988), White Fang (1991), On Deadly Ground (1994), Legends of the Fall (1994) and The Edge (1997), among others.

With his trainer, Doug Seuss

(via Imgur and Galen Rowell/AP)

Chris, the St. Bernard dog from Beethoven (1992)

(via Imp Awards)

Keiko (originally named Siggi), the male orca from Free Willy (1993)

(via Arcatatheater)

Santo, the dog who played Inspector Rex (1994-2004) between 1994 and 2000

(via Imageshack)

Frank the Pug from Men in Black (1997) and its sequel, played by Mushu, with the voice of Tim Blaney

(via Pooch)

Madison, the dog named Vincent from Lost (2004-2010)

(via Lostpedia)

Crystal, the tiresome capuchin monkey from Night at the Museum and its sequel (2006, 2009) and the drug dealing monkey in The Hangover Part II (2011).

(via Life As A Young Gamer)