Alexander Georg Nicolas Schallenberg (German: [ˌalɛˈksandɐ ˈɡeːɔʁk ˈnɪkolas ˈʃaln̩bɛʁk]; born 20 June 1969) is an Austrian diplomat, jurist, and politician who has been the acting chancellor of Austria since 10 January 2025.

On 10 January 2025, Schallenberg was appointed Acting Chancellor, following the resignation of Karl Nehammer, who himself had served in an interim capacity since October 2024.

After Kurz announced his pending resignation on 9 October 2021, Schallenberg was proposed by the ÖVP to replace him as Chancellor of Austria.

[6] His mother is a native of Switzerland, and the daughter of Swiss banker and president of UBS Alfred Schaefer.

[6] Schallenberg speaks German, French, English and Spanish fluently, and has basic knowledge of Russian.

[14][15] Schallenberg married French–Belgian European civil servant and fellow graduate of the College of Europe Marie-Isabelle Hénin (born 1969 in Uccle) in Saint-Pierre, France in 1995.

[22] From 2000 to 2005, he worked at the permanent representation of Austria to the European Union in Brussels, where he headed the legal department.

Schallenberg was widely seen as a mentor to the inexperienced Kurz who knew little of foreign policy, who in turn promoted him to senior posts.

[26] In his first official act, he nominated career diplomat and ambassador to France Michael Linhart to succeed him as foreign minister.

[30] In 2025, Schallenberg was appointed interim Chancellor for a second time by President Van der Bellen effective 10 January, following the resignation of Karl Nehammer.