Once Upon a Time - Season 4 - Frances O’Connor to Guest as Belle's Mother

Thanks to Justin for the heads up.

Once Upon a Time has tapped Frances O’Connor to play Belle’s mother in the upcoming fourth season, EW has learned exclusively.
The 47-year-old actress will portray Colette, whom we’ll meet briefly in the sixth episode, but find out she had an immense impact on Belle’s life. There’s a possibility to see her again later in the season.

Source:

EW