From scientists, to explorers, to mothers, to rebels, the female characters of Planet of the Apes are as diverse as the films themselves have been over the last fifty years. Get to know the ladies of the Ape Planet with these ten movie facts!

1 - Kim Hunter spent hours at the Bronx Zoo studying Chimpanzees in preparation for her role as Zira.

2 - Linda Harrison, who played Nova in the 1968 film, had a brief cameo in Tim Burton’s 2001 remake. She played a human woman who tried to stop Leo (Mark Wahlberg) from challenging the apes and threatening the safety of her tribe. Linda Harrison and Charlton Heston were the only cast members of the original film to appear in the remake.

3 - Zira’s first line to the humans in Escape from the Planet of the Apes, “Because I loathe bananas!” is a reference to Kim Hunter’s real-life dislike of the fruit.

4 - Escape from the Planet of the Apes was Kim Hunter’s third time playing Dr. Zira, making her the actor with the most consecutive appearances as the same character in the original series. She also appeared in subsequent films during flashbacks and re-used footage.

5 - Conquest of the Planet of the Apes became the first film in the original series in which Natalie Trundy appeared as an ape—she played Lisa, Caesar’s wife. In her other series appearances, she always played a human.

6 - In Rise of the Planet of the Apes, the lab apes’ cages have small labels on them giving information about the apes kept at GenSys. From these labels, we know that Caesar’s mother, Bright Eyes, was born in 1997, and was test chimp number 9.

7 - In the modern films, Caesar’s mother was a chimpanzee named Bright Eyes. This is a reference to the nickname Dr. Zira gave to Taylor in the 1968 original.

8 - The name Cornelia, who is Caesar’s wife in Dawn of the Planet of the Apes, is a reference to Cornelius from the original film series.

9 - Judy Greer, who plays Cornelia in Dawn of the Planet of the Apes, said in an interview that her husband is a massive Apes fan. In fact, they had a chimpanzee husband and wife cake topper at their wedding, and the 1968 original film as well as Rise of the Planet of the Apes were playing on separate televisions in the bar area during their reception.

10 - Karin Konoval, who played the orangutan Maurice in the modern trilogy, wore 10-pound weights on each arm on set, to help replicate realistic movement for her character.