There will be secret guests and lots of comedy when Neil Patrick Harris and Sarah Chalke host this year's "Creative Arts Emmys" -- and ET is exclusively with the two stars as they get ready for the big night.
"We are both wearing white dresses with blue tops," the "How I Met Your Mother" star jokes with ET. Then he continues, saying, "She has 13 changes, I am just going to wear one."
The two funny folks have worked together before when Sarah, who will be back for another season of "Scrubs" when it moves to ABC this fall, guest starred as a dermatologist on "Mother," who was removing Ted's (Josh Radnor) tramp stamp! Speculation is that she just may be the mother, but no one involved with the series will confirm that rumor.
The "Creative Arts Emmys" will be held Saturday, Sept. 21.