Nicholas Harry Aldis (born 6 November 1986) is an English professional wrestler. He is signed to WWE, where he is a producer and the on-screen general manager of the SmackDown brand. He is best known for his tenure in Total Nonstop Action Wrestling (TNA) under the ring name Magnus from 2008 to 2015, and the National Wrestling Alliance (NWA) from 2017 to 2022.

Aldis made his debut on the British independent circuit in 2004 before signing with his first major contract with TNA in 2008. During his seven-year tenure there, he won the TNA World Heavyweight Championship once, becoming the first British-born world champion in the company's history along with becoming a three-time tag team champion, winning the TNA World Tag Team Championship twice and the IWGP Tag Team Championship once. At Ring Ka King in 2011, he won the RKK World Heavyweight Championship.

Immediately after leaving TNA in 2015, Aldis signed with Global Force Wrestling (GFW), where he was the inaugural GFW Global Champion and subsequently became the longest-reigning champion in the title's history. In 2017, Aldis briefly returned to TNA, now Impact Wrestling, due to their new partnership with GFW, dropping the title and leaving the company later that year. He then signed with the NWA and would soon after win the NWA World's Heavyweight Championship, a title he would hold twice, becoming the second British wrestler to hold that championship (after Gary Steele), making him a four-time world champion in professional wrestling. Aldis then left the NWA in late 2022 and briefly returned to Impact Wrestling in 2023 before departing the company in July and subsequently began working for WWE in August.

Aldis also appeared in the 2008 revival of Gladiators, where he was known as Oblivion. He was also a co-presenter of Britain's Strongest Man on Challenge TV.

Nicholas Harry Aldis was born on 6 November 1986 in Docking, Norfolk. Before training to be a wrestler, Aldis became proficient in swimming and tennis; he then began bodybuilding, which ultimately led to him becoming a professional wrestler. In 2008 he made several appearances on Gladiators under the name "Oblivion" along with fellow professional wrestler Mason Ryan under the name "Goliath".

After beginning his training at the age of 16, Aldis made his professional debut on 17 December 2004 for the British Wrestling Promotion Dropkixx Wrestling (DKW), losing to Charlie Rage.

Early title matches included a DAM Promotions event where Aldis teamed up with Bash to take on the DAM Tag Team Champions Big Dave and The Bulk for the titles and he also went up against Ashe for the LDN Championship at Summit Wrestling, he would lose both matches. In 2007, he would face the WAW British Heavyweight Champion Brett Meadows for the title and lost. His last match before joining TNA was a win against Marty Scurll. During his time in England he wrestled primarily at All Star Wrestling and World Association of Wrestling.

In November 2008, Aldis signed with Total Nonstop Action Wrestling (TNA). On 11 December 2008 episode of Impact!, TNA started airing vignettes of Aldis' debut under the name Brutus Magnus, a modern-day gladiator.