Kodi Smit-McPhee is starring alongside Benedict Cumberbatch in the new film, The Power of the Dog.
On Tuesday, the Australian actor, 25, revealed his British counterpart - who is about to reprise his Doctor Strange role in Spider-Man: No Way Home and Doctor Strange in the Multiverse of Madness - refused to discuss the Marvel Cinematic Universe during their long days filming on set.
'I thought I could go into more details with him but he is extremely dedicated to his protection of the Marvel Cinematic Universe,' Kodi told the Courier Mail.
Silent: Kodi Smit-McPhee has revealed the one thing co-star Benedict Cumberbatch wouldn't talk about on the set of their new film, The Power of the Dog, during an interview with the Courier Mail. Kodi is pictured here in LA this month
Kodi went on to explain that Benedict stayed in character nearly the entire time they filmed The Power of the Dog - with him also sworn to secrecy about his role in upcoming MCU releases.
Kodi also hinted he would be thrilled to