Irina Wassilchikoff was a familiar face in many Italian films from the 1970s. Prior to identifying her, I gave her the nickname "Old Countess" because she has a somewhat regal appearance and always seems to be playing noblewomen of high society women, and we later learned that she really was a noblewoman in real life.
She was identified by Ciavazzaro thanks to the film Ash Wednesday (1973) in which she is credited as Irina Wassilchikoff, and Ciavazzaro also found an old news article about about the Hollywood epic Ben-Hur (1959), stating that several noblemen and noblewomen were used as extras for a party scene, and among these the Russian princess Irina Wassilchikoff.
The genealogy website Geneanet has a listing for a certain Princesse Irina Vassiltchikov: here.
She's listed as being born on 28 August 1910 and died 26 February 1992, and her parents are listed as Prince Hilarion Vassiltchikov and Princess Lydia Léonidovna Wiazemsky. Based on the extensive information listed for this family, the informations looks convincing.
- Amanti senza amore .... Audience member at concert (uncredited)
- Follie per l'opera .... Dancing woman (uncredited)
1953 - Le infedeli .... One of Luisa's friends (uncredited)
1960 - La dolce vita .... Woman waving at the helicopter (uncredited)
- Risate di gioia .... Party guest at the German villa (uncredited)
- Romanoff and Juliet .... Guest of the Concordia Russian embassy (uncredited)
1961 - Leoni al sole .... Marilù O'Connor (credited as "Irina Wassillikof")
1963 - Gidget Goes to Rome .... Party guest (uncredited)
- The Pink Panther .... Holiday guest at Cortina d'Ampezzo / Costume party guest (uncredited)
1964 - I marziani hanno 12 mani .... Party guest (uncredited)
1966 - After the Fox .... Audience member at the cinema (uncredited)
- Io, io, io... e gli altri .... Woman at the awards ceremony (uncredited)
1967 - 100 ragazze per un playboy .... Party guest (uncredited)
- Il tigre .... Party guest (uncredited)
1968 - Buona sera, Mrs. Campbell .... Friend of the Countess (uncredited)
- Candy .... Woman at the operation and at the post-op party (uncredited)
- House of Cards .... Party guest (uncredited)
- La matriarca .... Party guest (uncredited)
- La pecora nera .... Party guest (uncredited)
- Riusciranno i nostri eroi a ritrovare l'amico misteriosamente scomparso in Africa? .... Party guest (uncredited)
- Scacco internazionale .... Party guest (uncredited)
- Scusi, facciamo l'amore? .... Woman waiting to attend Bebe's funeral (uncredited)
- Straziami ma di baci saziami .... Guest at the Ingegnere's party (uncredited)
1969 - Il Prof. Dott. Guido Tersilli primario della Clinica Villa Celeste convenzionata con le mutue .... Party guest (uncredited)
1970 - The Adventurers .... Party guest (uncredited)
1971 - Stress.... Party guest (uncredited)
- Tre donne: L'automobile (TV) .... Restaurant diner (uncredited)
1972 - Avanti! .... Elegant woman on the plane (uncredited)
- La prima notte di quiete .... Woman at the funeral (uncredited)
- Questa specie d'amore .... Banquest guest (uncredited)
- Sbatti il mostro in prima pagina .... Woman at the funeral (uncredited)
1973 - Ash Wedensday .... Silvana Del Campo (credited)
- Io e lui .... Party guest (uncredited)
1974 - L'erotomane .... Member of the Board of Directors (uncredited)
1975 - Attenti al buffone .... Woman at the funeral (uncredited)
- I baroni .... Party guest (uncredited)
- Mahogany .... Woman at fashion show (uncredited)
- Un genio, due compari, un pollo .... Dinner guest (uncredited)
1976 - Cadaveri eccellenti .... Party guest (uncredited)
- Il comune senso del pudore .... Translator of Lady Chatterley 76's script (uncredited)
- Il secondo tragico Fantozzi .... Guest at the Countess' dinner (uncredited)
- L'innocente .... Party guest (uncredited)
- Telefoni bianchi .... Woman at Franco D'Enza's party (uncredited)
1978 - Dove vai in vacanza? .... Diner at the restaurant (uncredited)
- Eutanasia di un amore .... Book presentation attendant (uncredited)
- Indagine su un delitto perfetto .... Friend of Lady Clementine (uncredited)
- La cage aux folles .... Nightclub client (uncredited)
1979 - Caro papà .... Party guest (uncredited)
- Uno sceriffo extraterrestre poco extra e molto terrestre .... Woman at the firemen's ball (uncredited)
1980 - L'avvertimento .... Wedding guest (uncredited)
- Speed Cross .... Guest at Meyer's house (uncredited)
- Per amore (1976, credited as "Irina Wassilchkoff"?) .... Marina's mother (sources: IMDb, Notrecinema.com)