The actress, who plays Weatherfield's Sophie Webster, is filming an ITV documentary titled Corrie Goes To Kenya with some of her soap colleagues. The one-off programme will raise awareness of HIV in the country.
Vincent became emotional when visiting children in a Kenyan slum two days ago, the Daily Star reports.
A source told the newspaper: "Brooke was moved to tears by these kids, not because they lived in such awful conditions but because they live life with a smile on their faces despite the hardships."
Vincent later tweeted that she was "humbled" by the experience. Meanwhile, Jason Grimshaw actor Ryan Thomas - who is also filming the documentary - said that the visit has been "life-changing".
Sue Cleaver (Eileen Grimshaw) and Ben Price (Nick Tilsley) are also thought to be involved in the project.
Corrie Goes To Kenya will air in July.