The 4K UHD release includes English SDH (Subtitles for the Deaf and Hard-of-Hearing) for both the theatrical and director's cuts.
If you prefer reading the dialogue rather than having on-screen text, the full Donnie Darko screenplay is available online via Daily Script. Donnie Darko (2001) - DVD Movie Guide Donnie Darko subtitles English
: Highly recommended for its clean interface and extensive movie database. The 4K UHD release includes English SDH (Subtitles
Standard DVD versions also feature English and Spanish subtitles. Standard DVD versions also feature English and Spanish
If you have a digital file (like an .MKV or .MP4) and need an external subtitle file (.SRT), several reputable repositories host them. Note that you may need to choose a file that matches your specific version (Theatrical vs. Director’s Cut) to ensure the timing is correct.
* Presentation: Widescreen 2.35:1/16x9. * Audio: English Dolby Digital 5.1. English Dolby Surround 2.0. French Dolby Surround 2.0. DVD Movie Guide Donnie Darko [4K UHD] (2001) - DVD Movie Guide