The film, "Farrah's Song," aired Friday on NBC, detailing the former Charlie's Angel's treatment and hopes for recovery.
The 62-year-old Fawcett was diagnosed in 2006 with anal cancer that has since spread to her liver.
According to preliminary ratings released Saturday, "Farrah's Song" was NBC's most-watched program in its Friday night time slot in more than a year, excluding the Olympics.
But it was edged out by CBS' airing of the season finale of "Numb3rs." The crime drama drew an estimated 9.6 million viewers Friday.