R to V

R to V (stylized as Red Velvet 4th Concert 'R to V') was the fourth concert tour headlined by South Korean girl group Red Velvet, in support of their The ReVe Festival 2022 EPs Feel My Rhythm and Birthday. The tour begins on April 1, 2023, in Seoul, South Korea and conclude on June 6, 2023 in London, United Kingdom. The tour consists of 11 concerts in 9 cities in 9 countries around Asia and Europe. It also marks the group's first in-person concert tour in three years since the "La Rouge Tour".

Background
Prior to the release of The ReVe Festival 2022 – Feel My Rhythm, Red Velvet planned to hold special live concert "2022 The ReVe Festival: Prologue" at the SK Olympic Handball Stadium on March 19 to 20, but was canceled after members Irene, Joy, and Yeri were tested positive for COVID-19.

On March 3, 2023, SM Entertainment announced the tour titled "R to V" would begin from April 1, 2023, starting with two shows in Seoul, before heading to Singapore on April 21, followed by two shows in Japan on May 3 and 4, Philippines on May 7, two shows in Bangkok on May 13 and 14, Jakarta on May 20, Paris on May 24, Berlin on May 27, Amsterdam on May 30, and ending in London on June 6.

On April 26, it was announced that Joy would take a break due her poor health condition with the remaining shows continuing as a four-member group. On May 12, it was announced that Bangkok shows would be postponed indefinitely after Wendy was tested positive for COVID-19. On May 31, it was announced that Bangkok shows would be canceled due to rescheduling issues. A concert photobook of the R to V tour will be released on January 18, 2024.

Introduction
The concert was themed "R to V", presenting a bright and breezy "Red" style and a capable "Velvet" style stage.

Reception
The Guardian gave the Wembley Arena concert in London five stars out of five, writing that "Despite Joy's absence, the show doesn't suffer. The perfection is mesmerising: even though their music is the kind that gets you moving, this is a theatrical spectacle you sit down to watch." WhyNow gave the same concert four stars out of five.