diplomat and statesman who controlled Russia's foreign affairs during the reign of the empress Elizabeth.

Sent by Peter the Great to Copenhagen and Berlin for his education, Bestuzhev began his diplomatic career in the service of the Elector of Hanover at the Congress of Utrecht, which met in 1712 to end the War of the Spanish Succession. He subsequently went to London when the elector became George I of England, and he then served briefly in the court of Anna (Duchess of Courland and future empress of Russia). In 1721 he became the Russian minister at Copenhagen. The death of Peter (1725), however, prevented Bestuzhev's further advancement until 1740, when he was recalled to Russia by Ernst J. Biron, the empress Anna's chief adviser.

After a brief period of imprisonment following Biron's fall from power (1740), Bestuzhev was appointed vice chancellor by the new empress Elizabeth (1741). He soon became convinced that Russia's interests conflicted with those of France and Prussia and sought to ally Russia with Austria and Great Britain. Despite opposition within Elizabeth's court, Bestuzhev, aided by his brother, the diplomat Mikhail Petrovich, concluded an Anglo-Russian defensive alliance in December 1742.

His opponents subsequently prevented Bestuzhev from forcing Sweden (which was France's ally) to cede all of Finland to Russia, despite Russia's victory in the Russo-Swedish War of 1741–43, and they also concluded a Russo-Prussian defensive alliance (March 1743). But Bestuzhev, appointed chancellor in 1744, continued to prepare for an alliance with Austria, which, after much court intrigue, he finally concluded on May 22, 1746.

After the War of the Austrian Succession (1740–48), in which Russia fought from 1746 as the ally of Austria and Great Britain against France and Prussia, Bestuzhev tried to maintain his alliance system. In 1756, however, Prussia and Great Britain allied against France and Austria, and, in response, Bestuzhev's Council of Ministers proposed in March 1756 that Russia enter an alliance with Austria, France, and Poland against Prussia and Great Britain. Bestuzhev, stubbornly opposed to any Russian alliance with France, refused to support the proposal. Instead, he plotted with the grand duchess Catherine (future Catherine II the Great) to gain her support for his policies in return for his future support in making her regent when Elizabeth died. These intrigues only further weakened his influence, which already was insufficient to stop his opponents from concluding an alliance with France (Dec. 31, 1756) and drawing Russia into the Seven Years' War (1756–63).

In 1758 Bestuzhev was accused of engaging in treasonous activities, arrested, and condemned to death; in April 1759 his sentence was commuted to banishment to his estate at Goretovo. Despite his public exoneration when Catherine ascended the throne (1762), he never resumed a leading role in public affairs.