Indeed, Brown feels the Celtic winger is in form and someone you want in your side 'week in, week out.'
"James Forrest is looking sharp and he was causing St Mirren a lot of problems last weekend," the Celtic skipper told reporters at a pre-match press conference.
"He brings added pace and he’s scoring as well. We have a big squad but James is one you’d want in your team week in, week out.
“It’s easing off for us a bit. The next couple of weeks it’s just one game a week which allows us to work on things. We are in a good place and we want to continue that.
"Dundee United have had their ups and downs but they have great individual players. We’re looking forward to the game but it’s a hard place to go."
Celtic go into Sunday's clash top of the SPL and on an impressive run of victories domestically.