A major part of the movie revolves around the fact that Jane Wyman's character is supposed to be substantially older than Rock Hudson. In reality, Jane Wyman was only 38 and Rock Hudson was only 30 when they filmed this movie.
Originally, Douglas Sirk wanted the film to end with Ron's downfall after he recognizes Cary, leaving it open if Ron would survive or not. Producer Ross Hunter found that ending way too "depressing" and "disturbing" for the audience and therefore decided to go with a conventional happy end - which is the one we know today.
The house Jane Wyman's character lives in (on Universal's "Colonial Street" backlot) was built by on rented Universal property by Paramount Pictures for 1955's "Desperate Hours"; Universal left it standing after filming, altering its appearance for "All That Heaven Allows." Four years later, it was altered again, for use as the house of the Cleaver family in TV's "Leave it to Beaver," beginning with the show's move from CBS to ABC for the 1959 season. The house continued as the Cleaver house until the end of the series in 1962, but was known at Universal as the "Paramount House," not the "Cleaver House."
This film seems to borrow its title from the last line of the poem 'love and life' by Jhn Wilmot, Second Earl of Rochester: " All my past Life is mine no more, The flying Hours are gone: Like Transitory Dreams giv'n o'er, Whose Images are kept in store By Memory alone. The Time that is to come is not; How can it then be mine The present Moment's all my Lot; And that, as fast as it is got, Phillis, is only thine. Then talk not of Inconstancy, False Hearts, and broken Vows; If I, by Miracle, can be This live-long Minute true to thee, 'Tis all that Heav'n allows. "
This film was selected for the National Film Registry, Library of Congress, in 1995.