United Kingdom, Jan. 6 -- A representative for Ashley Tisdale has shut down speculation suggesting Mandy Moore and Hilary Duff were involved in her "toxic mom group".

The 40-year-old actress - who is mother to two children- recently called out "mean-girl behaviour" by a group of mothers she was friends with in a post on her blog and a recent essay published on The Cut which led to wild online gossip about whether any other celebrities were involved in the drama, but a spokesperson for Tisdale has now insisted the rumours are unfounded.

According to TMZ.com, the representative insisted it's "unfortunate" Tisdale's words have been "twisted" and there's "zero truth" to suggestions other famous faces were involved.

Tisdale first opened up ...