|Lady Penelope, her chauffeur Parker and some Pug.
Sylvia Anderson to guest star in Thunderbirds Are Go! TV series. It was announced that Sylvia Anderson will lend her voice to the part of Lady Penelope's great aunt, Sylvia! Sylvia not only co-produced the original Thunderbirds TV series but also voiced the original Lady Penelope.
Here is what she said about her involvement -