[RPG] Do I get the proficiency bonus with Shillelagh

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I am considering picking up the Shillelagh cantrip as part of my book of shadows pact boon as a level 3 Warlock.

The spell description states that I get to use my spell casting modifier (Cha + 3) instead of Strength for attacks. Does that mean I still get to add my proficiency bonus (+2) to the attack since I am proficient with my staff?

The wording from the PHB is below

The wood of a club or quarterstaff you are holding is imbued with
nature's power. For the duration, you can use your spellcasting
ability instead of Strength for the attack and damage rolls of melee
attacks using that weapon, and the weapon's damage die becomes a d8.
The weapon also becomes magical, if it isn't already. The spell ends
if you cast it again or if you let go of the weapon.

Best Answer

If you are proficient with a weapon, you add your proficiency bonus to attack rolls with that weapon. The spell does not change that. Warlocks are proficient with simple weapons, which includes the quarterstaff, so yes.