Sonia Petrovna, is a French dancer and actress (film, television and theatre), her most famous early acting roles were as who, in "Ludwig" alongside leading actors Helmut Berger?
Sonia Petrovna:  Her most famous early acting roles were those of Vanina Abati in "La prima notte di quiete" acting alongside leading French actor Alain Delon and as Princess Sofia in "Ludwig" alongside leading actors Helmut Berger and actress Romy Schneider, both in 1972. Helmut Berger: Helmut Berger (] ; born Helmut Steinberger; 29 May 1944) is an Austrian film and television actor.
Princess Sofia