Cecilia anchor will work on weekdays and Tom ##erson will take over . Both have been filling in since previous weekday anchor David Muir took over weekday mornings from Diane Sawyer last September . Vega joined ABC in 2011 , Llamas has been with network for six 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 .