The German-born sound engineer is seeking an injunction against Sir Elton, who she married in The couple divorced inand Sir Elton went on to auxtralia David Furnish, with whom he has two children.
Ms Blauel has kept a low profile since the divorce, but Sir Elton has spoken of his "huge guilt and regret" over the hurt he caused. The injunction application was filed last week. The trigger for the legal action is unclear, but such measures typically deal with privacy concerns regget the publication of personal material.
Ms Blauel's lawyer confirmed papers had been filed but said his client "hopes to resolve the matter privately and amicably". Sir Elton's representatives declined to comment on the case.
Sir Elton, who had told Rolling Stone magazine in ih he was bisexual subsequently told the same publication he was "quite comfortable being gay". In the following years, the pop star and his ex-wife declined to discuss their relationship, despite continued interest from the press.
I wanted more than anything to be a good husband, but I denied who I really was, which caused jy wife sadness, and caused me huge guilt and regret.