<P> In February 2017, Marvel announced the casting of the Runaways, with Rhenzy Feliz as Alex Wilder, Lyrica Okano as Nico Minoru, Virginia Gardner as Karolina Dean, Ariela Barer as Gert Yorkes, Gregg Sulkin as Chase Stein, and Allegra Acosta as Molly Hernandez . Shortly after, Marvel announced the casting of the Pride, with Ryan Sands as Geoffrey Wilder, Angel Parker as Catherine Wilder, Brittany Ishibashi as Tina Minoru, James Yaegashi as Robert Minoru, Kevin Weisman as Dale Yorkes, Brigid Brannagh as Stacey Yorkes, Annie Wersching as Leslie Dean, Kip Pardue as Frank Dean, James Marsters as Victor Stein, and Ever Carradine as Janet Stein . Loeb praised casting director Patrick Rush, explaining that all of the series regulars for Runaways were the producers' first choice for the role . The majority of the children are portrayed by "fresh faces", which was an intentional choice . </P> <P> By August 2017, Julian McMahon had been cast in the recurring role of Jonah . </P> <P> Filming on the pilot began by February 10, 2017, in Los Angeles, under the working title Rugrats, and concluded on March 3 . Director Brett Morgen was given free rein by Marvel and Hulu to establish the look of the series, and wanted to create a feel that was "very grounded and authentic". He also looked to differentiate between the hand - held, gritty world of the Runaways and the more stylistic world of the Pride . He felt the latter could be explored more in the series moving forward, but was not available to direct any more episodes of the season . Following completion of the pilot and the show's pick - up to series, there was concern among the cast and crew that the impending writers' strike would prevent the series to move forward . However, the strike did not happen, and filming on the rest of the season began at the end of June, again in Los Angeles . Production on the season had concluded by October 21 . </P> <P> In May 2017, Siddhartha Khosla was hired to compose the music for the series . Khosla said that, due to his history as a songwriter, his scoring process involves "working on these song - stories and weaving them through different episodes". He described the Runaways score as being "completely synthesized", utilizing analog synthesizers from the 1980s, specifically the Roland Juno - 60 and Oberheim Electronics' synths . Khosla compared the "alternative feel" of his score to Depeche Mode, adding "There is an element of rebellion, so sonically going for something that is a little bit outside the box, non-traditional, I felt was an appropriate approach . I feel like I'm making art on this show ." Alex Patsavas serves as music supervisor, having done so on all of Schwartz and Savage's previous series . On January 12, 2018, a soundtrack from the first season consisting of 12 licensed tracks plus two by Khosla, was released digitally . Additionally, Khosla's original score for the series was released digitally on January 26 . </P>

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