Zoe gets frustrated when Elmo has trouble performing their Friendship Day dance.

Elmo and Rocco's beef goes way back, if you didn't know. During the 30th season of Sesame Street in 1999, we were introduced to Zoe's 4-year-old pet rock.

"Sesame Street's" beloved muppet character Elmo has finally addressed his long standing feud with Zoe's pet rock Rocco. On Wednesday January 5, Elmo took to Twitter to assure "Sesame Street" fans ...

Elmo spoke out after a 2004 “Sesame Street” video of him losing his cool over co-star Zoe’s pet rock, Rocco, went viral online.

Sesame Street's Elmo set the internet abuzz after a nearly two decades-old clip from the favorite children's show went viral.

Jada Pinkett Smith has jokingly invited Sesame Street muppets Elmo and Zoe to appear on The Red Table Talk after an old feud between the two characters resurfaced.

Elmo spoke out after a 2004 “Sesame Street” video of him losing his cool over co-star Zoe’s pet rock, Rocco, went viral online.

Elmo’s hilarious beef with Rocco, a pet rock of Zoe’s in "Sesame Street," is going viral online. Elmo and Rocco's feud has gone on since 1999.

A resurfaced clip from a 2004 episode of Sesame Street recently went viral on social media, showing the beloved red puppet going crazy over his friend Zoe's pet rock, Rocco.

A 2004 clip in which the “Sesame Street” characters Zoe, left, and Elmo debate the reality of a pet rock captured a moment that viewers used to project their own sentiments.

A recent clip showing Elmo, Zoe, and Zoe’s pet rock, Rocco (sometimes spelled as Rocko by fans), went viral on social media. The saga between Elmo and Rocco is one that reaches back decades on ...