Mia Siegert Author Photo

Mia Siegert, Author

My husband (David Williamson) and I are costume designers most known for CATS the Musical. We won Broadway World’s Best Costume Design of a Play or Musical (Eastern PA, The Fulton, CATS, 2025) and were responsible for the viral “Cowboy CATS” at Casa Manana (2025). We designed and created the CATS costumes for Netflix's "Unbreakable Kimmy Schmidt" and the CW's "Crazy Ex-Girlfriend." Stage credits include The Fulton (2025), Casa Manana (2025), Wichita (2023), Interlakes (2017 and 2022), Lubbock Moonlight Musicals with Ken Page—may he rest in power (2014), Pitman (2025), and many more!

Sometimes we’re able to take on commissions but usually we rent out sets. Please see our Etsy store for information. If interested in renting a set, please contact us at siegertcreativellc {at} gmail {dot} com.

Costumes