Arielle -- who has appeared on How I Met Your Mother, The Ugly Truth, Bones and more -- will preside over the matchmaking on Love Island, which will premiere with a special 90-minute episode on Tuesday, July 9 at 8PM ET/PT..
"As a huge fan of the show, I can't tell you how excited I am to be hosting Love Island this summer. I'm here for it all... the love, the relationships, the re-coupling... bring it on," Arielle said in a statement.
"I feel so honored to be at the head of the table watching it all go down!"
As previously announced, new Love Island episodes will air every weeknight from 8-9PM ET/PT through Wednesday, August 7, when the season's 22nd and final episode will air.
"Watching Love Island is like watching your favorite romantic comedy five nights a week with your best friends... and Arielle would be the friend bringing the popcorn," CBS executive Sharon Vuong said in a statement.
"Aside from being a huge fan of the genre, she's a gifted performer with an impressive resume across multiple mediums who has a genuine and unique connection with all of her fans. We couldn't be more thrilled that she's joining us on this wild ride this summer."
However, the ambitious broadcast schedule won't significantly impact the weeknight broadcasts of Big Brother, CBS' existing summer hit that will premiere its 21st season on June 25.
Beginning July 10, Big Brother's Wednesday episodes will air in the 9-10PM ET/PT time period instead of their initial 8-9PM time period (the show's Thursday episodes already regularly air at 9-10PM ET/PT).
Love Island's format is a bit of a cross between Big Brother, Temptation Island, Bachelor in Paradise, and Paradise Hotel.
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Love Island -- which airs six night a week in the U.K. -- will feature a group of single "Islanders" coming together in a beautiful villa located in the tropical destination of Fiji.
On the lookout for romance, the singles will have to choose partners wisely all the while attempting to win the heart of home viewers, who will have the opportunity to shape events that will unfold on the show as they watch romances blossom.
The Islanders will be required to couple-up every few days, and those who fail to find a partner will risk being dumped from the island.
Challenges and dramatic twists come about as the new Islanders arrive and members of the cast form alliances, relationships and friendships in an effort to win both love as well as the grand cash prize.
The cast of Islanders will be announced shortly, according to CBS.