Hilary Duff: Buy My Sister Haylie's Book 'Real Girl's Kitchen'!

Hilary Duff and her husband Mike Comrie go out for lunch with their baby boy Luca on Tuesday afternoon (October 15) in Beverly Hills, Calif.

The 26-year-old actress sent out a tweet that day plugging her older sister Haylie Duff‘s brand new cookbook “Real Girl’s Kitchen.”

PHOTOS: Check out the latest pics of Hilary Duff

“my sisters book @RealGrlsKitchen is finally out today! Don’t forget to order or buy a copy amazing pics, recipes & stories! #RealGirlsKitchen,” Hilary tweeted. Go get yourself a copy right now!

20+ pictures inside of Hilary Duff out for lunch with her family…