Jim Henson created Kermit in 1955 & voiced & performed him until his death in 1990.
Steve Whitmire began performing & voiced Kermit until July 2017.
Now Matt Vogel has taken up performing & voicing Kermit.
Mrs. Piggy was originally done by Frank Oz; since 2002 she has been peformed by Eric Jacobson.
Steve Whitmire.Jim Henson used to do it before he died.
There's a list on Muppet Wiki. Start looking.
Jim Henson
The lizard - like Kermit became Kermit the Frog shortly before Sesame Street aired in 1969 .
Hi-Ho Kermit the Frod here
Kermit is a puppet. He can not be any type of frog.
Kermit The Frog has always been green.You can see his film history here
Kermit the frog is not on seaseme street because the German media company EM.TV & Merchandising AG bought Jim Henson Company, which held the rights to the Kermit.
kermit the frog
"Hi-ho, Kermit the Frog here"
Robin the Frog is the name of Kermit the Frog's nephew.
Kermit the Frog.
kermit the frog
Kermit the frog
"Kermit the Frog" is a Muppet created by Jim Henson .
kermit the frog
kermit the frog
kermit the frog
The lizard - like Kermit became Kermit the Frog shortly before Sesame Street aired in 1969 .
I think it is Kermit the frog