Alexey Fyodorovich Aladyin was born on March 15, 1873, in Novikovka, Stavropol District of Samara Province. He was a member of the I State Duma from the Simbirsk Province. His father, a prosperous peasant, soon went bankrupt, and the family moved to Simbirsk, where his father found work as a land surveyor.

Aladyin studied at a folk school and the Simbirsk gymnasium but was expelled from the 8th grade for participating in the revolutionary movement. After passing exams externally, he enrolled at Kazan University, where he initially studied medicine and later natural sciences. In 1892 and 1894, he attempted to agitate the peasants of Sviyazhsky District, and in 1895 and 1896, the workers of the Altufyevskaya factory.

On February 20, 1896, Aladyin was arrested and remained in custody until October 5, 1896, after which he was released on bail and sent to live in Simbirsk. In March 1897, he escaped from his place of residence and went abroad, where the case against him was suspended.

Living in Belgium, France, and the United Kingdom, Aladyin earned a living through odd jobs, working as an electrician and translator. In London, he taught the Russian language.

In early December 1905, he returned to Russia, to St. Petersburg, where he participated in strikes, spoke at rallies, and was a member of a combat squad. In early 1906, he went to Simbirsk and soon became a deputy of the first State Duma from the peasant curia. In the Duma, he was one of the initiators and organizers of the 'Labor Group' and became a popular speaker. In his speeches, he argued that only the State Duma could restrain the revolutionary forces of the people. In practical demands, Aladyin often held moderate positions and sometimes supported the Constitutional Democratic Party.

On July 3, 1906, he was elected as a deputy from the Duma to the inter-parliamentary congress in London, and he left abroad when the Duma was dissolved. He remained abroad.

In 1907, in one of the volosts of Simbirsk Province, Aladyin was elected as a representative from the peasants to elect electors to the State Duma, but his election was annulled by the Senate, as he was not a peasant householder. That same year, he visited the USA, where he successfully lectured about Russia and urged the US government not to provide loans to Russia until it ceased repressions against dissenters.

Aladyin worked as a journalist for British newspapers. With the onset of World War I, he applied to the Russian embassy in London for permission to return home but was denied. He then enlisted in the British Army and received the rank of lieutenant.

In July 1917, Aladyin returned to St. Petersburg and supported General L. G. Kornilov. After his speech, Aladyin was arrested and imprisoned in Bykhov prison but was released after the October Revolution.

During the Civil War, he joined the White movement and served in the Don Army with the rank of staff captain. In 1920, he established contacts with the British mission in Southern Russia, received troops and cargo from Britain in Ekaterinodar and Novorossiysk, and was involved in the evacuation of troops from Crimea. He later emigrated to Europe. He died in St. Thomas's Hospital in London and was buried at Brookwood Cemetery.