A computer-implemented method, comprising: at a device with a display and one or more input devices: displaying a messaging user interface wherein the messaging user interface includes a transcript of a message conversation that includes a plurality of messages to or from a sender; receiving a collection of media items from the sender; in response to receiving the collection of media items from the sender, displaying a representation of the received collection of media items in the transcript of the message conversation with the sender; while displaying the representation of the received collection of media items and in accordance with a determination that a suggested collection of media items is relevant to the received collection of media items, displaying an affordance that corresponds to the suggested collection of media items for sharing with the sender, wherein the affordance that corresponds to the suggested collection of media items was not displayed prior to receiving the collection of media items from the sender; receiving, via the one or more input devices, a first input selecting the affordance that corresponds to the suggested collection of media items; in response to receiving the first input, displaying, on the display, the suggested collection of media items, wherein the first input selecting the affordance that corresponds to the suggested collection of media items was received while displaying a user interface that does not include the suggested collection of media items; prior to displaying the affordance that corresponds to the suggested collection of media items, displaying, on the display, the transcript of the message conversation concurrently with a keyboard region that includes a suggestion region that is populated with input suggestions; while displaying the transcript of the message conversation concurrently with the keyboard region, replacing display of an input suggestion in the keyboard region with the affordance that corresponds to the suggested collection, wherein the affordance that corresponds to the suggested collection is displayed concurrently with the transcript of the message conversation; subsequent to displaying the suggested collection of media items, receiving, via the one or more input devices, a second input representing a request to transmit at least a portion of the suggested collection of media items to the sender; and in response to receiving the second input, transmitting a message to the sender as part of the message conversation that provides access to the at least a portion of the suggested collection of media items and displaying a representation of the suggested collection of media items in the transcript of the message conversation. displaying a messaging user interface wherein the messaging user interface includes a transcript of a message conversation that includes a plurality of messages to or from a sender; receiving a collection of media items from the sender; in response to receiving the collection of media items from the sender, displaying a representation of the received collection of media items in the transcript of the message conversation with the sender; while displaying the representation of the received collection of media items and in accordance with a determination that a suggested collection of media items is relevant to the received collection of media items, displaying an affordance that corresponds to the suggested collection of media items for sharing with the sender, wherein the affordance that corresponds to the suggested collection of media items was not displayed prior to receiving the collection of media items from the sender; receiving, via the one or more input devices, a first input selecting the affordance that corresponds to the suggested collection of media items; in response to receiving the first input, displaying, on the display, the suggested collection of media items, wherein the first input selecting the affordance that corresponds to the suggested collection of media items was received while displaying a user interface that does not include the suggested collection of media items; prior to displaying the affordance that corresponds to the suggested collection of media items, displaying, on the display, the transcript of the message conversation concurrently with a keyboard region that includes a suggestion region that is populated with input suggestions; while displaying the transcript of the message conversation concurrently with the keyboard region, replacing display of an input suggestion in the keyboard region with the affordance that corresponds to the suggested collection, wherein the affordance that corresponds to the suggested collection is displayed concurrently with the transcript of the message conversation; subsequent to displaying the suggested collection of media items, receiving, via the one or more input devices, a second input representing a request to transmit at least a portion of the suggested collection of media items to the sender; and in response to receiving the second input, transmitting a message to the sender as part of the message conversation that provides access to the at least a portion of the suggested collection of media items and displaying a representation of the suggested collection of media items in the transcript of the message conversation.