Katherine Heigl and Sarah Chalke Are BFFs in Netflix's Firefly Lane Trailer

The outgoing Tully Hart (Katherine Heigl) and the introverted Kate Mularkey (Sarah Chalke) have been best friends since the age of 14, as we learn in the just-released full trailer for Firefly Lane. The new Netflix series based on the novel by Kristin Hannah follows their friendship through decades of career highs and personal lows — which apparently include Tully hooking up with the man of Kate's dreams.

Firefly Lane premieres February 3 on Netflix.

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Andy Hunsaker has a head full of sitcom gags and nerd-genre lore, and can be followed @AndyHunsaker if you're into that sort of thing.