In between Australia and Malaysia, we reported rumours that the 36-year-old was already essentially running the famous Oxfordshire based squad.
Officially, however, she remained just the commercial director, having quickly gained a few promotions in the past 18 months, including taking over from her father on the team's board.
On Wednesday, Williams announced that Claire is now the deputy team boss.
In the newly created role, she will "work alongside" her father "in the day to day running and long term development" of the team.
"The position will strengthen the future of the team and create a clear succession path for Williams," read the media statement.
Ms Williams joined her father's team as a press officer in 2002.
"With Claire being appointed deputy team principal," Sir Frank Williams said on Wednesday, "I know the future of Williams is in extremely safe hands."