Andy, who is currently filming series seven with the rest of the cast, enjoys a close relationship with his brother and the producers are said to be eager to bring their "bromance" on screen. But it looks like Mark needed a bit of convincing to join the show.
"The producers are having to fight for him," an insider told The Mirror. "They think it would be great to get another brother on the show and, as Andy and Mark get on so well, it would make another little team within the cast and spice things up with the girls too."
Mark would follow in the footsteps of Louise Thompson's brother Sam who joined in the last series.
Other new faces on the show could include some of HELLO! Online blogger Lucy Watson's female friends.
Fellow co-star and close friend Binky Felstead has previously hinted that the next series promises unexpected and exciting romances blossoming.