
Acting
Born in Vlădești, Argeș County, he graduated high school in Câmpulung in 1967 and Bucharest's Caragiale Academy of Theatrical Arts and Cinematography in 1971. He made his theatrical debut a year before graduating, at the Bulandra Theater, in Truman Capote's The Grass Harp. His screen debut came in Dan Pița's Nunta de piatră (1972); he would later appear in the same director's Filip cel Bun (1975). Other directors with whom he has worked include Alexandru Tatos (Mere roșii, 1975; Secvențe, 1982; and Secretul armei secrete, 1988), Virgil Calotescu (Buletin de București, 1982; and Căsătorie cu repetiție, 1985), Nae Caranfil (Asfalt Tango, 1996; and Filantropica, 2002) and Cătălin Mitulescu (The Way I Spent the End of the World, 2006). In all, he has appeared in more than sixty films. Diaconu worked with Lucian Pintilie both in film (the 1981 De ce trag clopotele, Mitică?) and in theater: Gogol's The Government Inspector at Bulandra, and Shakespeare's As You Like It at the Nottara Theater. Liviu Ciulei hired him at Bulandra in 1972, and he remained there for a decade, before moving on to Nottara. At Bulandra, he appeared in Twelfth Night and The Tempest, both under Ciulei's direction; and in Marin Sorescu's Răceala, directed by Dan Micu. At Nottara, he appeared in Alexander Ostrovsky's The Forest; Ultimul bal, after Liviu Rebreanu's Forest of the Hanged; and Mihai Ispirescu's Într-o dimineață. He became the director of Nottara Theater in 2004, working as such until his resignation in 2011.

Love Sick
2006

Bucharest Identity Card
1982

Dănilă Prepeleac
1996

Ticăloșii
2007

Philanthropy
2002

The Way I Spent the End of the World
2006

Horea
1984

The Telephone
1992

This Above All
1978

Repeated Wedding
1985

The Actress, the Dollars and the Transylvanians
1978

Căruța cu mere
1983

Poker
2010

A Light on the 10th Floor
1984

Asphalt Tango
1996

Toma Caragiu - Momente de aur
2003

Kino Caravan
2009

The Oil, the Baby and the Transylvanians
1981

Shootings Under the Moonlight
1977

The Secret of the Secret Weapon
1988

A Smile Of The Sun
1987

The Prophet, the Gold, and the Transylvanians
1978

The Stone Wedding
1973

Happy End
2006

The End of the Night
1982

The Poseidon Explosion
1973

Videograms of a Revolution
1992

Oil
1977

O vară cu Mara
1988

Red Apples
1976

Fii cu ochii pe fericire
1999

Reach for the Sky
1990

Operation 'The Bus'
1978

To Paris with the Identity Card
2015

The Computer Testifies
1982

Why Are the Bells Ringing, Mitica?
1981