| Runtime: | 25 minutes |
| Creator: | Albert Barillé |
| Voices: | Roger Carel Annie Balestra Olivier Destrez Alain Dorval |
| Country: | France |
| Network: | France 3 |
| Num Episodes: | 26 |
Once Upon a Time... Planet Earth (French: Il était une fois... notre Terre) is a children's television educational animated series directed by Albert Barillé. It is the seventh series in the Once Upon a Time... franchise.
The series was produced by Procidis and France 3 with the support of the Centre National de la Cinematographie, the Directorate-General for Research of the European Commission and the European Broadcasting Union (EBU). The series was initially broadcast since 22 December 2008 on France 3. Its original premise was set up from "Once Upon a Time... the Earth (and Tomorrow?)", the final episode of the first series Once Upon a Time... Man, thus finally going back to the beginning where it all started and ended. The series' premiere also coincided with the 30th anniversary milestone of the franchise.
| Country | Television broadcasts | |
|---|---|---|
 France | France 3 *, Gulli *, Unis | |
 Canada | CBC Television, Télévision de Radio-Canada, Fairchild TV (Cantonese) | |
 Israel | Logi | |
 Indonesia | SPT (Indonesia) *, SPTI | |
 Spain | Televisión Española (TVE) * | |
 Germany | WDR *, SWR *, rbb * | |
 Austria | ORF | |
 Italy | Italia 1 * | |
 Switzerland | TSR (French) *, RTSI (Italian) * | |
 Belgium | RTBF * | |
 Poland | Telewizja Polska (TVP), TV Puls | |
 Portugal | RTP | |
 Sweden | Sveriges Television (SVT) | |
 Finland | Fox Broadcasting Company | |
 Republic of Ireland | ||
| United States of America | PBS | |
 Iceland | Sjónvarpið | |
 Turkey | Kanal D | |
 Hungary | Minimax, Da Vinci Learning | |
 Hong Kong | TVB | |
 Croatia | RTL KOCKICA, Da Vinci Learning | |
 Qatar | Jeem TV | |
| Russia | Карусель * |