Avner’s one-man show, Avner the Eccentric, was a hit of the 1984–1985 Broadway season. He co-starred in Lincoln Center’s production of Shakespeare’s The Comedy of Errors, and returned to Broadway in 1989 in a principal role in Ghetto. In regional theatre Avner has played both Estragon and Vladimir in Waiting For Godot, played the title role in R. Crumb Comix, and co-starred with his wife, Julie Goell, in the world premier of Zoo of Tranquility.

Avner’s new show, Exceptions to Gravity, defies the barriers of language and culture and has toured extensively all over the US and abroad. Avner has often played on subscription at regional theaters including Arena Stage, Trinity Rep, Actor’s Theater of Louisville, The Empty Space, Indiana Rep, The Goodman Theater, Portland Stage, Merrimack Rep, Virginia Stage Company, Dallas Theater Center, Seacoast Rep, and San Jose Rep.

Avner is often a featured performer at comedy, magic and theatre festivals, which in past years have included The Edinburgh Festival, where he won the New Faces of 1991 Award, and was a finalist for the Perrier Award, the Israel Festival, the Montreal International Comedy Festival. He has also appeared at the London International Mime Festival, the Festival of American Mime, the New York Clown Theatre Festival, the Fool’s Festival, the New York Magic Symposium, the Hudson Clearwater Revival, and the International Movement Theatre Festival. Avner has won special jury awards at The International Festival du Cirque in Monte Carlo, Arosa International Humor Festival, Barcelona International Clown Festival, Leipzig Lach Messe, St Gervais International Theater Festival where he won both the public and the jury awards. Avner was recently inducted into the International Clown Hall of Fame.

Avner is regularly featured on television specials throughout the world. He has been seen on the Paul Daniels Show and Packing Them In in Great Britain, on the NTV 35th Anniversary Special as well as numerous appearances on NHK in Japan, Sebastian C’est Fou, Le Plus Grande Cabaret du Monde, and Cabaret Sauvage in France, Un Dos Tres and the Juan Tamariz Special in Spain, Martes 13 in Chile, Ritmo de la Noche in Argentina, UNICEF Comedy Special in Italy, the Montreal Just for Laughs Comedy Festival on Showtime, and many more.