* Rumours have circulated on social media for some weeks
* Lawyer for actress did not immediately respond to calls
PARIS, March 28 (Reuters) - A French actress has filed a complaint with the Paris prosecutor for breach of privacy over Internet rumours alleging she has a relationship with President Francois Hollande, the prosecutor's office said on Thursday.
A spokesperson for the prosecutor's office told Reuters that actress Julie Gayet had filed a complaint against "persons unknown", a common formulation under French law, on March 18 over rumours circulating on Twitter and blog sites for some weeks.
A lawyer for Gayet did not immediately respond to phone calls and Hollande's office declined to comment.
Hollande and first lady Valerie Trierweiler are unmarried but have been in a relationship for several years. They met when she was working as a journalist for a French magazine.
Their relationship came under media scrutiny during Hollande's campaign for the May presidential election and in the months afterwards as Trierweiler became an active tweeter and maintained a literary review column in Paris Match magazine.
Gayet, 40, has dozens of film credits to her name including a minor role in the 1993 Franco-Polish drama "Three Colours: Blue" and a leading role in "Select Hotel", for which she won two awards for her depiction of a young drug addict. (Reporting by Chine Labbe; Writing by Catherine Bremer; editing by Mark John and Michael Roddy)
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