Sesame Street Episode 1576 features a group of birds called the "Canary Brothers", two of which are named Zeppo and Gummo Marx.Fozzie explains, "I know it's crazy - but, you see, my dream is to be here with all the Hollywood comedian greats, you know? My pawprint right here with them, like Abbott and Costello, and the Marx brothers, and - oh, look, the Ritz brothers!" In The Muppets Go Hollywood, Dick van Dyke catches Fozzie Bear with a bag of cement, planning to add his own signature to the Grauman's Chinese Theatre sidewalk.In Christmas Eve on Sesame Street, Oscar says to Maria "He'll come back-he's part homing pigeon," echoing Chico's line in At the Circus.
At one point, David imagines him with "hair like Harpo." In Episode 1176 of Sesame Street segment, David and Maria imagine Gordon with a variety of hairstyles.
In Episode 0930 of Sesame Street, Oscar reads from his TV guide his favorite programs he's missing on Grouch TV, one of them being Best of Groucho.Spike replies in an eyebrow-raising, faux cigar-holding Groucho-Marx pose, "Why should I? She never speaks any of mine." However, he speaks in such a thick brogue, that Sam can't understand him and claims he is not speaking the Queen's English. Spike Milligan assists Sam the Eagle with an oration in The Muppet Show episode 317, in which he comes out on stage representing an English gentleman.
Temporarily breaking away from his gypsy voice, Peter said in Groucho style, miming cigar-holding, "Listen, any more talk like that and I will play!" He appears as a gypsy violinist on The Muppet Show episode 219, being told "play" by the Muppets.