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The women from "Selling Sunset" are bringing the drama from their reality show to their premiere party ... because Chrishell Stause and Chelsea Lazkani didn't get invitations -- and it was intentional.

Sources familiar with the situation tell TMZ ... Netflix did not have an official premiere party for "Selling Sunset" Season 9, but Bre Tiesi organized an event with her fellow cast members. Gallery Launch Gallery Getty

Chrishell and Chelsea got the short end of the stick here ... they were MIA from Wednesday night's party at Gravitas in Beverly Hills.

Our sources tell us Bre wanted the party to highlight a great season ... and event organizers felt it was best not to invite Chrishell or Chelsea, because there's been some drama brewing between them and Bre, Emma H

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