Viggo Mortensen did the lot: wrote, produced, directed and starred. Lance Henriksen (the android Bishop from Aliens etc.) plays his irascible father. There's little to redeem him or indeed the whole endeavour as many scenes play like a stage show; I expect it has been entirely eclipsed by the Oscared The Father. Laura Linney doesn't really nail Viggo's just-the-good-bits-thanks sister. The second flashback track has Hannah Gross as his luminescent-in-a-Cate-Blanchette-way mother married to Sverrir Gudnason, looking a bit like Casey Affleck. She was in Mindhunter. Terry Chen was somehow very familiar but I can't say why.
I picked it up on the strength of Viggo (he should've aimed for Captain Fantastic) by way of Jeannette Catsoulis's review.