The Big Love star has been dating Navarrette since 2013, after they worked together on short film Magic Hour, and now it appears they are considering marriage.

Sevigny, 40, showed off a piece of jewellery on her left ring finger during a recent interview with a V magazine reporter, prompting the writer to ask if she is engaged.

Sevigny coyly replied, "It's sort of an engagement", but stops short of offering up any further explanation of their relationship status.

The actress has previously dated Pulp rocker Jarvis Cocker and Spring Breakers director Harmony Korine.