The Irish presenter will be heading up one of two 'SOS Squads' in London tomorrow (August 25) aiming to deliver straight to the front doors of customers who tweet their dilemmas via the #ARGOSIT hashtag.
"I can't wait to get involved with the #ARGOSIT SOS Squads and help people have a great bank holiday weekend," Dowling said.
"Be it last minute visitors, a sudden downpour or even a best man who has forgotten the rings, it'll be Brian to the rescue."
A dedicated 'SOS Squad' will also be made available in Birmingham.
Argos Head of Brand Marketing Carl Nield added: "We wanted to give something back to our customers to prevent any interruptions to their bank holiday weekend. No other retailer offers such convenience and peace of mind for shoppers."