| Gio Petré | |
| Birth Name: | Ann-Marie Birgitta Bengtsdotter Petré |
| Birth Date: | 1 November 1937 |
| Birth Place: | Stockholm, Sweden |
| Nationality: | Swedish |
| Other Names: | Gio Petré Thunholm[1] Gio Marmstedt |
| Occupation: | Actress |
| Years Active: | 1955–1974 |
| Partner: | Alf Enerström (-1998)[2] |
| Spouse: | |
| Children: | 2 (with Marmstedt) 4 (with Enerström) |
Gio Birgitta Petré, née Ann-Marie Birgitta Bengtsdotter Petré (born 1 November 1937), is a Swedish film actress. She appeared in 27 films from 1955 to 1974.