Leader of the Government in the Senate (Australia)
The current Leader of the Government in the Senate is Mathias Cormann. The current Deputy Leader of the Government in the Senate is Simon Birmingham, who was appointed on the same date following the resignation of Mitch Fifield.
Margaret Reid (politician)
On 5 May 1981, Reid was elected by a joint sitting of the Australian Parliament to fill a casual vacancy in the representation of the Australian Capital Territory in the Senate, following the sudden death of her close friend, Senator John Knight. This was the first of only two occasions on which a Senate casual vacancy was filled in this manner, as the law was later changed to provide for a replacement senator to be appointed by the relevant territory (ACT or NT) legislative assembly.