Situated on Langstane Place, the venue is the newest venture from Signature pubs, owners of Copper Blossom in Edinburgh and Church on the Hill in Glasgow.
Specialising in cocktails, wines and spirits, there will also be a "highly desirable menu" with a variety of dishes to suit everyone.
The new bar will also be the first in the city to serve Cold Town, a craft lager brewed especially for the Signature Group.
The Spiritualist’s drinks menu will offer an assortment of exciting cocktails with many of the drinks featuring a theatrical or interactive element, such as the ice spheres that need to be smashed open to reveal your drink.
The team say there will even be a sharing cocktail called the Disco Diva, which is served in a disco ball to be enjoyed by groups visiting the bar, as well as masterclasses available to learn to make cocktails from the experts.
The Spiritualist will offer a fresh and varied brunch menu, featuring favourites such as homemade pancakes, smashed avocado on sourdough toast and eggs benedict.
The lunch and dinner menu will feature Hanging Grills - skewered chunks of tender meat served with a choice of sauce and sides - and Filthy Fries, chips topped up with a variety of additions such as smashed haggis with peppercorn sauce, macaroni cheese with bacon bites or halloumi with chilli jam.
Area manager for The Spiritualist, Christian White, said: “We want The Spiritualist to be somewhere the people of Aberdeen can pop in for brunch on the weekend, relax with family or come for a night out with friends. From a casual drink to heading ‘out out’, we’ve got everyone covered. As well as the bar, we’ve got a private dining room upstairs where we’ll be hosting events and corporate bookings.
“The Spiritualist team can’t wait to welcome everyone and unveil what we’ve been working on. The venue looks amazing and there’s certainly nothing else like it in the city. We can’t wait to show it off to the community!”