unknown to somebody

unknown to (one)

With someone being unaware (of something). Unknown to Jacobson, the other two partners had drawn up the deal in such a way that they would have full control of the company in two years' time. My wife invited her entire family to come stay with us for Christmas—unknown to me.
See also: unknown
Farlex Dictionary of Idioms.

unknown to somebody

without the person mentioned being aware of it: Unknown to me, he had already signed the agreement.
See also: somebody, unknown
Farlex Partner Idioms Dictionary
See also:
  • unknown to (one)
  • unbeknownst to (one)
  • unbeknown to (one)
  • not know (someone) from a bar of soap
  • not have the first idea
  • none the wiser
  • play kissy-face
  • play kissy-face (with someone)
  • different sides of the same shield
  • play kissy-kissy (with someone)
References in periodicals archive
Now she is setting out to complete phase two of her ambition: to top the best seller list and the way things are going she looks set to go from unknown to somebody overnight.
Overnight success - af ter 30 lean years; It's every aspiring writer's dream: to be plucked from the slush pile of unknowns and turned into a published author overnight. Jill Tunstall meets Anita Anderson whose novel Somebody has done that for her - and won two prizes to boot