Cecilia Vega will work on Saturday and Tom Llamas will take last September . Both have been filling in since previous weekend anchor David Muir took over weekday shows from Diane Sawyer Sundays . Vega joined ABC in 2011 , Llamas has been with network for five months .
Cecilia Vega will work on Saturday and Tom Llamas will take Sundays . Both have been filling in since previous weekend anchor David Muir took over weekday shows from Diane Sawyer last September . Vega joined ABC in 2011 , Llamas has been with network for five months .