And, she’s not the only one to be snubbed.
Insiders say that Harry’s ex-girlfriend, Chelsy Davy will also miss out on the evening event at Frogmore House.
Instead both women will be sent home after the formal nuptials take place in Windsor Castle.
While no word has been heard from Pippa, the unexpected snub is said to have caused considerable hurt to Chelsy, given that the pair have remained friends since they split.
‘Chelsy is the queen of night-time parties. She's wild and fun, and no evening bash is really complete without her, so friends are surprised she hasn't been invited,’ a source told The Daily Mail.
‘Chelsy is surprised too, shocked in fact, and a little hurt.’