The 38-year-old always feels drained after shooting a film but she was impressed by how hard her director husband Len Wiseman worked on their new movie "Total Recall", reported Contactmusic.
"It's so immersive for a director doing a movie like this and I really feel like I've got so much more insight into that than I ever would have had before.
"We're sprinters, actors are. We come in and then we do the sprint and then we go, 'Oh my God, I'm so tired, I must go on holiday immediately, I'm exhausted, maybe I will go to rehab.'
"And Len has been doing it for two years, 24 hours a day, seven days a week. It's extremely impressive and kind of humbling," she said.
Beckinsale has a 13-year-old daughter, Lily, with ex-partner Michael Sheen and she said the teenager enjoyed visiting her on the set of "Total Recall".
"This one she really enjoyed because Colin (Firth) was coming down his trailer stairs in just a pair of pyjamas covered in tattoos and holding his baby. I mean, what 13 year old doesn't want to see that? An extremely titillating image. But everybody was really cool with her," she added.